In the spring of 1959, thirteen people are caught in a violent storm on a small island off the coast of Mallorca. No one could predict what would happen at the small hotel where they were staying: Elisa Mander, a discreet British tourist, was found dead. What initially appeared to be suicide soon turned out to be a disturbing murder. Basil, a retired actor who was once famous as Sherlock Holmes on the silver screen, is unexpectedly tasked with solving the case. In a place where no one can escape and no one can reach him, every guest and every staff member becomes a suspect in a crime that becomes more intricate and complex by the minute.