In what could be their last case as partners, Jake and Charles go to great extremes to apprehend a local bike thief. Terry shockingly isn't in the lead for "Mr. Nine-Nine" (the detective who has solved the most cases), leaving Rosa determined to boost his ego. Meanwhile, Amy spends some precious time with Holt.

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.