One fine day, at about 10 am, in a suburban house, three men, in their thirties are waiting for a fourth buddy. When he arrives, they plan to hold up the local bank where Séverine, their accomplice, is waiting for them. This could well be the beginning of a thrilling crime story, but these tough men, sporting tattoos, are not what they appear. "On fait comme on dit" is a comedy, and these guys could be descendants of the Keystone Cops. They are dreamers not gangsters. So much is riding on this bank heist, the pressure is intense. This tension creates the most diverse and unexpected obstacles for them...