High school seniors on a graduation trip to Mallorca with teachers find their plans derailed when forced into hotel quarantine due to a new COVID-19 outbreak.

Raimunda lives and works in Madrid with her husband Paco and their daughter Paula. Raimunda's sister Sole lives nearby. The two sisters miss their mother Irene who died several years ago in a house fire along with their father. When a former neighbor from their hometown reports that she has seen the ghost of Irene, the daughters do not believe her. After a murder and a family tragedy, however, Irene's spirit materializes around her daughters to comfort them.