Complete story — includes the ending
On the fifth annual Halloween heist, all members of the squad try to capture the champion cummerbund. Charles, Rosa, and Terry team up to form "The Tramps", as none of them have won the heist yet. Amy figures out Jake's plan and finds the cummerbund; but it is revealed that Jake changed the inscription on the belt from "amazing human/genius" to "Amy Santiago, will you marry me?" Amy accepts Jake's proposal and the two become engaged. While he is happy for them, Captain Holt is slightly upset by the fact that no one technically won the heist, since Jake changed the belt.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Brooklyn Nine-Nine season 5. HTML formatting and reference markers removed. · Content license