Term starts at boarding school Tuna Kvarn and neighbouring state school Holmered. Hugo, Caroline and Philip prepare for the year's election in the Zebra Room. Meanwhile, Nasim is concealing a secret.

A body is found in the Svartån river, and several people have disappeared. A disturbing video is spread by an anonymous person. Carl presents his new investment project in an unusual way.

The divide between the two schools widens as police investigate what happened. Hugo has a word with the Zebra Room. Meanwhile, William is acting increasingly stressed.

Sara is on enemy soil, and Isaac is vindicated. The annual inter-school relay takes place, but events aren't what Sara had hoped for. Philip and Hugo plan for the upcoming long weekend.

Preparations are underway for two parties - Philip's "house party" and Carl's annual reunion. The police investigation continues as the parties bring some people closer together, and some further apart.

Sara receives an unexpected visit from her past. Caroline pressures Hugo. Meanwhile, William makes a huge decision, Philip's romantic plans go awry, and Isaac is allowed to get into the swing of things.