The precinct packs up and heads to the Tri-State Police Officers' annual Cop-Con, which is usually the Nine-Nine's excuse for a big annual party. But the squad's fun is threatened this year when Holt asks them to be on their best behavior. Then, Amy suddenly vanishes hours before taking the Sergeant Exam, and it's up to Jake and Rosa to find her before it's too late.

Captain Holt's mom seeks support from the precinct after her house is robbed. Meanwhile, Terry, Rosa and Boyle remodel the breakroom and Amy teaches Gina how to change her own car tire.