A young writer named Marcus returns to the seaside hotel Briatico in Calabria where his relationship with his girlfriend ended mysteriously years ago, against the dramatic backdrop of a local chapel set on fire. Haunted by the events, he has penned a novel based on their ill-fated love affair, hoping to find closure. However, upon his arrival, Marcus realizes that the hotel has undergone significant changes. Desperate to immerse himself in the local atmosphere, he secures a job as the resident pianist, concealing his true intentions and identity.

As Marcus settles into his new role, he forms a connection with Petra, a beautiful and enigmatic orderly who is hiding her own secrets. Unbeknownst to Marcus, Petra is a law student driven by a personal vendetta — the belief that her brother's murder is connected to the hotel and its late owner, Averici, who was also brutally killed on the hotel's opening night.

Drawn deeper into the web of murder and intrigue, Marcus unwittingly becomes entangled in the investigations surrounding Briatico hotel, where no one is who they say they are. Together with Petra, they uncover a shocking revelation: Averici had stolen a rare and valuable stamp called the Sicilian Error from Stefania, the former owner of the hotel. Stefania had invested her life savings into the stamp, intending to pass it down to her grandchild. However, since the hotel underwent renovations, the whereabouts of the stamp's secret safe remain unknown. So is the true personality of the heir.

As Marcus transforms from a novelist into an amateur detective, he uncovers the unsettling connection between his own past and the dark secrets that permeate Briatico hotel. The truth he uncovers shatters his perception of the past, leading him down a dangerous path where betrayal, love, and redemption intertwine.