Half the party gets arrested for murders. The other half escapes. The jailed half gets bought out of prison by the Sea Lord because Exalted Tortuga has been taken over by Skullstone, and he needs them to go kick Skullstone out with maximum force. The other half are recruited by someone in a fancy mansion that they don't recognize to quietly influence Skullstone off of Tortuga, on the down low. He pays their murder fine to get them to agree.