Having impressed the judges at the Magical Girl Tournament, the Magical Girls Club is invited to a special Magical Girls summer camp in the World of the Witches.

Sasami feels weird about some the skills the Magical Girls are learning at the camp, as does Ms. Washu, who sees the potential to either right past wrongs or do the opposite.

The storytellers have a short window of time to protect the Magical Girls from the power of the Great Cauldron, especially when the Chief Sorceress is requesting that Sasami and her friends reach into the deepest, darkest parts of their souls.

When Ms. Washu bans the Magical Girls from going back to the World of the Witches, Misao becomes upset. Little do they know, but the World of Witches will come to them in a way they cannot expect.

Itoki is out for Washu, and when the Magical Girls join the skirmish, Misao and Sasami discover a new power, with some people they know taking notice of this development.

Misao tries to do something for Monta, but the reaction from him sends her down a path that leads to a place which is far removed from the Magical Girls Club itself.

Misao, after hiding in the World of Witches, gains a position of honor due to her growing magic skills, and even a new title.

The friends of Misao venture into the Tower of Twilight to save her, but the question remains: who will save Misao's friends?

The Chief Sorcess tells Misao to try to access the deepest parts of her soul. While this may not happen, a meeting with a person she is familiar with may give Misao all the negativity she needs.

While the Chief Sorcess wants some of Sasami's power, the Magical Girls understand that the magic of friendship itself can effectively battle evil. As such, they realize that they can trust each other and work as one, then humanity can be saved.

Even though normality seems that it is returning, Itoki tells them of a new magic trouble, with Ginji realizing that he can only stop this by hurting those closest to him.

The Magical Girls realize they must depend on one another to fight their foes from the World of the Witches, as they know that only true friendship between them can save the world from calamity.