Retired security expert Robert travels to Venice with his daughter Claudia, a successful journalist, to attend a glass art exhibition organized by his ex-wife Louise. A valuable goblet is stolen during the vernissage, whereupon Robert agrees to recover the exhibit inconspicuously. The amateur detective starts investigating together with Claudia. The investigative duo receive unexpected help from the friendly restaurant owner Mia and her son Marco. There is a spark between the two couples, but Robert and Claudia have no idea: Mia and her son are involved in the case.