I have to admit that I was getting a little bored twenty or thirty minutes in. The situation had seemed a little artificial and I wasn't convinced of the relationship between Moi and Biel. However, the dynamics and pace changed after the arrival of Mikel, unctuously played by Joe Manjón.
Imperceptibly, Mikel started to destroy the relationship between Moi, Mia and Biel. In turns charming, seductive and forceful, he treated each of the others in a way that played to their weaknesses.
I don't know how Ricardo Gómez managed to convey mental illness so convincingly. His faced drooped and sagged, with never, or rarely, a smile. However, in Mia's memories, he was a good-looking lad completely different from the part he was playing in the present.
The strength of the orphaned siblings' relationship overcame all in the end. The moment of violence split asunder the group in a firm rejection. The brother and sister dealt with the aftermath but there was one lingering doubt - Mikel had phoned someone to say where he was. We are left to contemplate if there might be consequences stemming from that call.