What's the point? Book 2

After Leo's mutation with the Death Ringers, everyone goes back home. Donnie instantly tries to find a cure for him but still nothing. So Sensei helps Leo any way he can in controlling his new forms and helps his son learn how to use it, but when a mission to stop some Footbots goes wrong they are forced to retreat. Raph is very upset with this and says something that changes everything for Leo.
Chole is at a sleepover when this takes place and Karai and Leo have told everyone about them dating which suprised everyone a little bit at first but they don't mind.
Karai also told everyone to start calling her Miwa instead of Karai so she can try to break away from Shredder as much as possible.