A reporter arrives in Rijeka and is placed in a hotel room numbered 23 where he also meets a mysterious roommate with a shady past. His arrival in the city coincides with the dissappearence of a famous local musical artist. His interest sufficiently piqued, he starts an amateur investigation of his own, which traps him in the inescapable clutches of the city's criminal underworld, putting the life and safety of both him and his family at risk.