When mysterious creatures invade a Greek seaside port, a misfit band of musicians, tourists, bodybuilders, and grannies unite to save the city in this quirky action-comedy.

Pheidippides, a brave soldier and messenger of ancient Athens, is ordered by the Athenian general, Miltiades, to run to Sparta and request aid to confront the Persian army led by King Darius the 1st, in the Battle of Marathon.