Retired security consultant Robert Frank accompanies his reporter daughter Claudia to a prestigious exposition of Venetian glass organized by her mother, his ex-wife Louise Berengo, and her second husband Antonio. At the grand opening, thieves sabotage the alarm and stage a blackout to switch a paste copy with the signature medieval masterpiece beaker. Claudia gets Robert to put his expertise to use and attempt retrieving it before a scandal ruins Louise's reputation, putting off informing insurance and authorities. Present was the prime suspect: Louise's arch-rival, antiques and art merchant Boris Jetrowitsch, whom he overhears offering a rare piece to leading Venetian collector Anna Cantonelli. Robert has a crush on local restaurant owner Mia and Claudia has one on Mia's son Marco, who catered the opening and is devoted to his angelic but seriously-ill son Luca. Robert fails to deliver an anonymously demanded 100.000-Euro ransom, but finds out the annoying truth.