On an isolated island in Brittany at the end of the eighteenth century, a female painter is obliged to paint a wedding portrait of a young woman.

After hiding his loot and getting thrown in jail, Ruby, a brooding outlaw encounters Quentin, a dim-witted and garrulous giant who befriends him. After Quentin botches a solo escape attempt, they make a break together. Unable to shake the clumsy Quentin Ruby is forced to take him along as he pursues his former partners in crime to avenge the death of the woman he loved and get to the money.