Following the structure of Seasons 1 through 3, "Elite" Season 4 revolves around a mystery revealed in the first episode in a flash forward. This time around, it stars a new character, Ari, played by Díaz. Ari is a new student at the prestigious high school, Las Encinas, and she's the daughter of the new principal (Martín). In the new season, Ari is found floating in the lake, seemingly dead. Thankfully, they are able to resuscitate her, but the police have no idea who hurt her or why.
In the Season 4 finale, the answer is finally revealed. The night of a New Year's Eve party, everyone is together when all the drama from the season implodes. Ari has been playing with both Samuel and Guzmán's hearts, but in the end, they aren't guilty. Instead, it's Armando (Velencoso), the older, manipulative client of Ari's younger sister, Mencía (Cariddi), who assumes she's a sex worker despite being underage and pushes her to keep having sex with him. By the finale, Ari finds out about this and confronts Armando on the dock of the lake. Bad idea.
After Ari threatens Armando, he attacks her, only stopping and running off when Guzmán appears. Ari sends Guzmán after Armando, and in her injured and inebriated state, Ari falls into the lake, where they find her floating later. As for Guzmán and Armando, well, it turns out that this season isn't quite free of death. Guzmán fights and fires a flare gun at the man, killing him instantly, and Samuel helps him hide the body. Even though these two teenage boys have an unreasonable amount of experience with murder and covering up crimes, Armando's death is likely to be a problem in Season 5.
