Marlowe visits Mars' casino where he asks about Regan, who is supposed to have run off with Mars' wife. Mars is evasive and tells Marlowe that Vivian is running up gambling debts. Vivian wins a big wager and then wants Marlowe to take her home. A stooge of Mars' attempts to rob Vivian but Marlowe knocks him out. While driving back, Marlowe presses Vivian on her connection with Mars but she admits nothing. Back at home, Marlowe finds a flirtatious Carmen waiting for him. She says she did not like Regan and mentions that Mars calls Vivian frequently. When she attempts to seduce Marlowe, he throws her out. The next day, Vivian tells him he can stop looking for Regan; he has been found in Mexico and she is going to see him.