After being injured during a shootout, police officer Vincenzo (Cicero) decided to spend his recovery on a cruise ship. A man of the land and not the sea, he investigates a series of small and entertaining "police cases" with the help of his faithful assistant, Sipio Premounta, from Trieste.

The mysterious singer, the ghost that appeared in a cabin, the entanglement with the twins, the disappearance of a nonexistent body, the illegal gambling den, the lost precious jewels: these are some of the cases that Cicero takes on, guided by the intuition of a cop, similar to his friend and mentor Salvo Montalbano.