The story follows Samantha (“Sam”) , a young girl who grows up in a deeply abusive household. Bullied by neighborhood girls and tormented by her violent, alcoholic father, Sam suffers immense trauma. Her only comfort becomes Bingo , a mysterious Tibetan Mastiff puppy she secretly befriends. As Bingo grows unnaturally large and powerful, he forms an unbreakable, almost supernatural bond with Sam, one that turns into a weapon of vengeance.