In Karlsson's Gambit, your character is a guy who is in prison for five years and thinks that was done unfairly. In prison, a strange lady come to you and says you can get rehabilitated via some special program. You just have to join the Karlsson Group, the richest business in this world. Do so and you get released in six months. You will face lots of dangers, cruelty, and conflicts, as well as get the opportunity for passion and lots of sex.