Alpha And Omega: The Legend of the Saw Tooth Cave is the 4th installment of the Alpha and Omega franchise.
In the introduction, a wolf hides from an unknown predator. Back in Jasper Park, the Alpha pups from the West and East pack are at Alpha school. Stinky claims that he is the best future leader than the other pups, but Claudette, his sister, thinks otherwise. Winston finds Runt in the group, and he tells him to return to Omega School. Runt is eager to hunt with the other alphas but Kate shows up and calls him over. Runt hides from her and Humphrey in the nearby tall grass. Humphrey tells runt to listen to Kate. In response, Runt says "Why should I? You never do". Kate then tells Runt that Lilly has a field trip planned for the omega pups. Lilly says they are going to Shadow forest, which shocks Tony. Tony tells Lily about his time as a young alpha in the forest. He believes he saw a ghost. He warns them and says they should not venture there. Humphrey, Lilly and the pups venture into the forest anyway, but are stopped by Floyd, a porcupine, who warns them of what's ahead. They find Sawtooth Cave. Suddenly a wind storm in the forest picks up, Humphrey decides to leaves but finds Runt climbing a tree. A large wolf ghost appears and scares Runt.
Later on, Runt, Humphrey, and Lilly return to the den. Eve asks them why they were late, and tells them they missed dinner. Humphrey states Runt had an "incident," but Runt insists he is fine. Kate thinks a different field trip would be better, but Humphrey assures her that the forest is a good place to explore. They then hear Tony say "Stay away!" in a dream. Eve yells "Wolf Attack!" waking both Tony and Winston immediately. After waking up from the nightmare, Tony asks how their trip to the forest was. Lilly replies it was great, but the area "had some strange weather patterns". Runt agrees, who mentions "Especially by Saw Toothed Cave". Tony is angered at him for going to the cave, but the pups gain interest in hearing Tony's side of the story. After some persuasion from Winston, Tony reluctantly decides to tell them what happened when he went there.
Tony as a young Alpha along with young Link and Lyle are hunting a squirrel. They find the squirrel going into a cave. Tony decides to lets the pups go up. He tells them to be brave but are too scared to go up. Tony then goes up to investigate only to be scared after seeing a ghost. He ends his story by stating that he never went into the forest again. Kate tells everyone that it is getting late. The pups thank Tony on the "horror story", and they return to their den. That night, Kate and Humphrey are worried about the pups growing up as they prepare to sleep. Runt has a nightmare about the Saw Tooth Cave and sees the silhouette of a female wolf. He wakes up screaming from his dream, and tells his siblings that he has to go back while convincing them to come with him. They agree and the next day, the pups set off back to the haunted forest. There, they meet two female porcupines, Frieda and Fran, who insult and forbid them to enter. The pups pass anyway, but as they approach Saw Tooth Cave, they are attacked and chased away by the ghost. They narrowly escape it. However, Claudette returns without Stinky. They look for him, but do not find him at first. Runt, in a tree, looks at Saw Tooth Cave and sees the same wolf he saw in his dream, realizing the ghost is protecting her life. The wolf points out where Stinky is - sliding down the edge of a cliff. Runt and Claudette find Stinky holding for dear life on the cliff's edge.
Runt and Claudette rescue him before returning to the den, where Kate and Humphrey are upset about the pups lying to them. Kate tells them to stay away from the forest, but the pups are fed up with them being overprotective. Tony finds Lyle and Link and tells him about what they saw. Lyle and Link disagree with Omegas and pups exploring the forest due to it being "off-limits." Tony tells them that it is against his wishes, but the twins decide to venture in the forest anyway. Meanwhile, the pups set off again, this time followed by Kate and Humphrey. Kate offers to go on a family walk, but Claudette tells them they are grown up and want to explore by themselves. Kate and Humphrey hesitantly agree, but later Humphrey tells Paddy and Marcel to watch the pups. However, it does not take long for the pups to realize they are being followed, so they split up. Paddy follows Stinky and Marcel follows Runt and Claudette. Runt runs off to the cave to meet the white wolf. The wolf urges Runt to leave but Runt climbs a tree to the cave and offers a pine cone to the wolf as a gift. Link and Lyle venture to the forest only to encounter Frieda and Fran. They threaten the twins, who end up being scared away, and run further into the forest. They approach the cave and remember their puppy-hood in the forest, and the bet on who should go first. They see the ghost and run away in fear, passing Frieda and Fran along the way. They return to the den to tell the pack about what they saw, but only disbelief in their story ensues in the pack. They call the porcupines witches, which humors the pack. Link and Lyle feel ashamed and decide to go back in order to chase out the ghost, believing they will be hailed as "heroes". Runt hears this, and they ask him if he saw anything unusual. Runt simply replies he has seen "something strange down by the river" before returning to the Saw Tooth Cave. Runt meets the white wolf again and learns her name is Daria. He warns her that some members of his pack are after her. She tells Runt about her past, and that she needs him to help her return to Rabbit Poo Mountain. Through a flashback, it is revealed that Daria was born genetically blind and the Head Wolf saw her "useless" and decided to kill her. Daria's mother saved her - thus breaking the rule of the pack - and sacrificed herself to protect Daria. She was found by Floyd who took Daria in to raise her. This also reveals that the ghost is her mother, who protects Daria from outsiders. The trio venture to Rabbit Poo Mountain. As night falls the group gets very tired and almost give up. The porcupine lays down on a wooden bridge while Runt gets him something to eat. Suddenly the ground starts shaking. The source of the noise turns out to be a truck driving by. Daria is almost struck by the truck but Runt saves her just in time. The next day, as they near the other side of the valley, Humphrey and Kate catch up with them, wanting to help, before they arrive at Rabbit Poo Mountain. Kate leads Daria to the female wolves in the pack, but her mother is not there. The Head Wolf recognizes Kate and Daria, and he follows them when they leave. Lois, recognizing Daria as her sister, follows them as well to tell Daria that their mother was killed and that the pack's laws never changed.
The Head Wolf and two others find them near Shadow Forest, where Kate and Humphrey fight two of them while the Head Wolf follows Runt and Daria into the forest. Daria narrowly escapes and the ghost attacks the Head Wolf, and in a flash of light, kills him. Kate and Humphrey catch up to see this as Daria thanks Runt for helping her. Meanwhile, Freida and Fran are leading Winston and Eve to Shadow Forest just as the others arrive. Runt introduces Daria to his grandparents and tells them that the ghost was only protecting Daria, also saying that they must accept her or they will "continue to be haunted." Winston, Tony, and the others agree, and knowing that her daughter will finally be safe, Daria's mother's spirit leaves Shadow Forest forever. Kate and Humphrey tell Runt that they are proud of him and the film comes to a close with all of them returning home with Daria as the newest member of their pack while the sun shines over Shadow Forest for the first time in many years.
- Ben Diskin as Humphrey
- Kate Higgins as Kate / Stinky / Lilly
- Lindsay Torrance as Claudette
- Debi Derryberry as Runt
- Chris Smith as Marcel / Paddy
- Gina Bowes as Daria / Freida and Fran
- Maxwell Je as Winston
- Bill Lader as Tony
- Cindy Robinson as Eve
- Dennis Cox as Head Wolf
- Blackie Rose as Floyd
- JoJo Blue as Lois
- Solomon Gartner as Lyle and Link
Trailer and Clips