Lifelong pranksters who once left summer camps in flames and terrified counselors, a group of old friends - now all but Marcell, the wealthy but unhappy engineer - plots a daring art heist: sneak a bizarre painting into the century’s biggest auction. They even rope in their estranged buddy and a professional thief, but their “perfect” plan quickly unravels into chaos, wild adventures and plenty of frog–eating mayhem, which suits them just fine.

On March 15, 1848, a young firebrand poet, Sándor Petöfi ignites the Hungarian Revolution with his passionate 'National Song', prompting the Austrians to dispatch a ruthless secret agent to assassinate him and suppress the uprising.