The story is set in a small town where several children have gone missing under mysterious circumstances. As fear and panic grow in the community, teenager Sofia (played by Marisol Nichols), who is on house arrest due to some past trouble, begins to suspect that these disappearances are the work of the Cucuy. Sofia, living with her younger sister and father, becomes embroiled in the supernatural mystery when she starts to witness strange events from her window.

As Sofia investigates further, she uncovers the dark origins of the Cucuy legend. She learns that the creature is a malevolent entity that preys on misbehaving children, dragging them away to its lair. With the help of her friends and family, Sofia must confront the Cucuy to save the missing children and protect her own sister, who is now in danger.

The film centers around a young teenage girl, Sofia (played by Marisol Nichols), who is under house arrest and begins to suspect that El Cucuy might be behind the recent kidnappings.

Blending folklore with modern horror elements, Cucuy: The Boogeyman taps into cultural myths to deliver a suspenseful and chilling experience. The film explores themes of fear, family, and courage, offering a thrilling tale of a young girl facing off against an ancient evil.