Northern Mexico - 1997. Ulises, a detective tired of the violence that his work and country present, narrates in detail his last case before retiring: The disappearance of Lucía Pardo.

In a context with few possibilities of mobility, Diego and his mother are faced with the need to share time and space. Household chores and interviews accompany their routine, suddenly, a malfunctioning boiler interrupts life. Diego's girlfriend's birthday is coming up and with it several decisions to make.

Eight children disappear from a small town as part of a witch's revenge. The town folk demand to know what happened to them. The search will lead them to something truly terrifying.

Eight children disappear from a small town as part of a witch's revenge. The town folk demand to know what happened to them. The search will lead them to something truly terrifying.

Eight children disappear from a small town as part of a witch's revenge. The town folk demand to know what happened to them. The search will lead them to something truly terrifying.

After opening a shoebox, Diego begins to feel severe fatigue that prevents him from performing everyday activities and leaves him bedridden. At the same time, his friend Liz suffers from a mysterious insomnia while working on a stage production.