Valerie is in love with a brooding outsider, Peter, but her parents have arranged for her to marry another man – who is wealthy. Unwilling to lose each other, Valerie and Peter plan to run away together when they learn that Valerie's older sister has been killed by a werewolf that prowls the dark forest surrounding their village. Hungry for revenge, the people call on famed werewolf hunter, Father Solomon, to help them kill the wolf. But Solomon's arrival brings unintended consequences as he warns that the wolf, who takes human form by day, could be any one of them.
Guillermo del Toro presents Mama, a supernatural thriller that tells the haunting tale of two little girls who disappeared into the woods the day that their parents were killed. When they are rescued years later and begin a new life, they find that someone or something still wants to come tuck them in at night.