When a date goes wrong and Elena, a woman that liked fetishist porn, is killed, the Criminal Investigation Unit takes over the case. The cause of death was a heart attack due to the injection of animal grass directly in her veins. After several interrogations, Jonathan Yáñez finds other case involving an overweight person that died of heart attack and that had, in her belongs, the card of Julio Santibáñez, an employee of Spa Renaissance.
