Sebastian prepares to take the most important step of his life, marriage. However, what seemed to be the most romantic proposal in history, ends up becoming a nightmare when a video is revealed in which Lucia, his girlfriend, is cheating on him. With the help of his friends, Sebastian will have to rethink where his life is going if he wants to learn how to survive the single life.

Sebastián, devastated by his breakup, joins a support group that promises him instant happiness. Fabiana comforts Lucía while she deals with Gonzo, to whom she mistakenly sends a nude. Gonzalo, obsessed with recovering the photo, resorts to absurd methods. Daniel debates whether or not to give the ring to Mafer. Fish, who broke up with Yaneth, joins Sebastián in his quest for happiness.

After receiving the news that Lucía will be in the film with him, Sebastián's friends organize a bachelor's welcome to encourage him to go out again in the world of dating. Sebastián accepts, but on one condition: ALL OF THEM HAVE TO GO. Between blind dates, diapers and a motorbike, the night ends up being one that Sebastián will never forget.

Sebastián and Fish are making efforts to find Julieta, the girl with the unicorn pin. Lucía prepares to shoot her first scene with Sebastián and goes to Fabiana to blow off some steam. Mafer and Daniel go out with their married friends, hiding from their single friends. Gonzalo is presented with the opportunity to invest in a new dating app and convinces Sebastián to try it out.

Sebastián continues to endure Farré's trials to prove that he can be a serious actor and work with Lucía. Fish, seeks to demonstrate his commitment when he falls in love with a cam girl he wants to rescue. Mafer and Fabiana have the famous date with Jaureguiberri. Meanwhile, Daniel refuses to receive help from his father and will need to come up with ideas to pay for the wedding Mafer dreams of.