This is basically a murder mystery, a whodunnit. In stead of a police-officer, here it's a new high school teacher who tries to unravel the strange circumstances of her highly popular predecessor's suicide. In her quest several suspects turn up, from some of the students to even her own husband, and eventually she gets more and more bewildered, doubting her own sanity and ultimately realizing that her own life is at stake. The pace is high and the story is definitely entertaining, keeping you guessing until the very end, when we at last do get a satisfying solution to all the mysteries, albeit a bit farfetched and coming out of the blue.
The acting is fine, especially Arón Piper does a great job as the troubled, ominous student Iago (he's also one of the more outstanding actors in the popular Netflix series "Elite"). Inma Cuesta as main character Raquel is as beautiful as a young Penélope Cruz, but unfortunately she has to act with every new episode more and more hysterical, what eventually got a bit on my nerves. In fact all major characters were constantly shouting and crying and yelling at each other, maybe that has something to do with the Spanish temperament, but as far as I'm concerned it could have used some tuning down. And maybe a bit of humor to counter all the heavy stuff would have been welcome too, now it was all so terribly dead serious.