As a result of a parody of trials, Blutch and Chesterfield are both sentenced to capital punishment for escaping from the enemy... They will only have to rescue General Gooseberry, a prominent member of the Northern General Staff who came especially for them. Provided of course to accept a somewhat special mission: Blutch and Chesterfield must go to the south to embark on the cargo ship "Rose of Bantry" on their way to Ireland, to find a Southern diplomat named Hogan and to eliminate him... On the idea of the general, Blutch made himself appear as an Irishman who brought his deceased father back to his native country and he managed to negotiate with the captain the boarding of the casket where Chesterfield is hiding. They only left to find their target. But will they succeed with an alcoholic and superstitious captain in their paws on this boat which seems to be empty?