Luke, Danny, and Matt somehow join together to form the Defenders. Jessica wants nothing to do with it when Luke offers her a place on the team.

Then the team discovers a girl who was brainwashed by Kilgrave and she won't listen to any of them. Luke calls Jessica in, hoping she'll help with the situation by being able to relate to the girl.

And that leads to Jess joining the Defenders and the Defenders finding out about Jessica's past with Kilgrave etc.

I'd write it myself but I have no grasp on Danny as a character!