As she twirls to the sound of Cuban music, Jade Samson, a sublime Salsa teacher, collapses in the middle of a rehearsal. Simon and Chloé invade the Academy of Latin Dances where the victim worked, and discover that she has been poisoned. Is the murder related to his recent selection for the World Salsa Championships which are to take place in a week? At stake: a check for $100,000 for the winning duo. Enough to whet jealousies and appetites... The investigation starts at a frenzied pace, especially since Simon has to manage at the same time the announcement of great news to Sam, Clara and Violette. He has fallen in love and doesn't know how to tell them. Especially since the newly elected is not totally unknown to them...