Disa's husband has found himself a new love and a new future, while Disa has found herself in an unsatisfactory life. But one day a chatty father with seven children appearance, an uncommunicative patient at Disa's hostipal has begun to open up, and a new martial arts teacher has begun teaching in this small town in Dalarna.

Swedish Foreign Ministry bureaucrat Gösta Engzell, overlooked during WWII, rescued thousands while turning supposedly neutral Sweden into a moral force. His efforts challenged the status quo and left a lasting humanitarian legacy.

Bamse's friends go on a quest to find the Thunderbell, the ingredient that makes Bamse strong. Meanwhile, the sly Reinard pretends to be a good guy to supplant Bamse as the hero of the town and win the affections of Mickelina.