As graduation approaches, Tina, Blaine and Sam band together to hold a senior "lock-in" at school, hoping to savor their last chance at hanging out together. But their plans are thwarted when Becky joins unexpectedly. Meanwhile, in New York, Elliot is stuck in the middle between Rachel and Santana's feud.

Current and past members of New Directions reunite for one final assignment - to reinvent their favorite performances. But these new versions of the series' most iconic tracks should not be seen as goodbye to glee club. On the contrary, they are celebrations of what the club has meant to each and every member.