The recluse Jintan is stumped when his deceased childhood friend Menma suddenly appears one day and asks him to make her wish come true.

Jintan decides to go to school again, thinking that might be Menma’s wish, and also to keep his promise to Anaru.

Anaru has run away from home and is living in the hideout. Jintan tells her she cannot skip school or be away from home forever. Anaru makes a decision.

The gang's cermony to help Menma pass on didn't go as planned, and they realize they need to put their own selfishness aside to figure out what Menma really wants.