Your job; Assassin. But you have a morale: Never kill women or children.
You get a job: Assassinate three wealthy targets - easy peasy. But when you enter and search their mansion you find it to be three orphaned sisters!
As you are about to abandon the mission and leave the mansion, another assassin from another organisation enters to kill them, but after expediting him the three sisters approach you with a counter offer: Become their bodyguard!