Dafne lives with her stepmother Lisa, they are both very close, but everything changes when Renzo, Lisa's new partner, comes into their lives. Dafne is still a university student with all her hormones raging, and with that desire to have her first time, she sees Renzo as very attractive, and does everything possible to get his attention. Renzo, doubtful but also with a very strange fetish with his stepdaughter, leaves Lisa aside to have an affair with Dafne, without caring about ending the relationship. Dafne uses her charms many years younger than her stepmother to seduce Renzo They both wait for the moment to take that flame of lust between them to the next level, knowing that they are committing the worst sin that can exist in a home.