It's Halloween, and the officers of Brooklyn's 99th Precinct have planned the heist of all heists to determine who really deserves the title of The Ultimate Human/Genius! Taking on the roles of Jake Peralta, Rosa Diaz, Terry Jeffords, Amy Santiago, Charles Boyle, and Raymond Holt, work to solve the mystery of WHO last had the trophy, WHICH trophy is secretly the ultimate trophy, and WHERE they've stashed it!