When Cassandra's motocycle breaks down while she, Gersinho, and Leide are coming back to Sao Paulo from a math competition, Leide calls Cassa ndra's mechanic father. A painful confrontation with the past follows.
Marina Quiroga, a daring upper-class girl with a detective's soul, sets off to catch the serial killer that has been terrorizing her town with her faithful butler Hector's help.