Rip, Saltine, and Swooper travel to Venice to look for a historical batch of confetti, but find themselves embroiled in a mystery involving secret organizations, curses, gondoliers, and the knife Brutus used to kill Caesar.

Rip and Saltine attend the Arky Gala, the most glamorous event of the year, where Saltine makes an unlikely friend; their reverie is shattered when the gala is taken hostage by a ragtag group of criminals.