Louisa Mangotti is a gorgeous American lawyer and Interpol expert who, after being offered a job working with the international crime unit in Venice, receives a mysterious postcard from the Venetian Ghosts, the ancient protectors of the Republic. But Louisa assumes her bad-boy ex, Matteo, sent it in a quixotic attempt to gain her attention. Louisa may have dismissed the ghosts, but the ghosts aren't quite done with her. When the bodies of two glassmakers wash up on Murano Island, the cryptic messages persist. Reluctantly, Louisa calls upon Matteo to help decipher the clues.
And before she knows it, a flame that was never fully extinguished is rekindled. Sensing that her sister is in over her head, Barbara Mangotti rushes to the rescue, only to be lured away by two handsome Venetian men. With time running out, can the two beauties solve a crime that could threaten the city of Venice itself?