After their school collapses, three working class friends—Samuel (Itzan Escamilla), Nadia (Mina El Hammani) and Christian (Miguel Herrán)—are given scholarships to Las Encinas, the most exclusive private school in Spain, where the elite send their kids to study. The scholarships are sponsored by the construction company at fault for the collapse. At Las Encinas, the three are initially ostracized by the wealthy students. However, Samuel soon befriends the rebellious Marina (María Pedraza), whose corrupt father controls the construction company. At the same time, Nadia becomes close to Marina's charismatic but arrogant brother, Guzmán (Miguel Bernardeau). Guzman's girlfriend, Lu (Danna Paola), dares him to take Nadia's virginity. Meanwhile, Christian becomes involved in a polyamorous relationship with aristocratic couple Polo (Álvaro Rico) and Carla (Esther Expósito). Outside Las Encinas, Nadia's closeted brother Omar (Omar Ayuso) secretly sells drugs to make enough money to get away from his conservative parents. He soon befriends the son of Las Encinas' principal, Ander (Arón Piper), who is also Guzmán and Polo's best friend. Omar and Ander begin a secret relationship. Marina and Samuel begin to date but she also begins an affair with Nano (Jaime Lorente), Samuel's elder brother who is fresh out of prison and has debts to pay. As the school year progresses, their lives intertwine in a clash of lifestyles, resentments, envy, and sexual attraction. Through a series of flash-forward scenes of police interrogations, the audience is shown stories of the character's relationships that somehow lead to a murder.