Iiris tries to recover from her difficult separation with Artturi when she unexpectedly meets Anton. The relationship doesn't get a chance to progress far when Iiris' son Niilo suddenly becomes ill. Niilo would only need a small operation, but once the boy enters the operating room, the hospital is subjected to a cyber attack. The power is cut off, the ventilators stop working and all access to patient data is blocked. Nurses have to prioritize whose life is the most valuable.

A first-time substitute teacher Ensio finds a boy sitting underneath a school desk. He decides to help, but perhaps taking the boy to swimming classes and jumping along in the swimming pool goes too far, especially when the boy's mother hears about it.