Leslie promotes her new book, and Ann tries to bond with Ron and April.
Leslie tries to find Ann a date for Valentine's Day; Ben asks Ron to help with the scavenger hunt Leslie sent him on; Chris is upset about his love life.
Ben gets a job offer, forcing Leslie to think about their future; Tom looks for a new business idea.
Ben and Leslie put together a black tie gala to raise money for the park, but a drill for a city-wide emergency derails their plans; Andy gets ready for his police academy exam; Ron fills in for Leslie on Pawnee Today.
A heatwave contributes to a spike in crime on Oahu; Danny and McGarrett search for a bank thief; Kamekona price gouges with his ice, inciting a riot; Junior and Tani's car is stolen while they're on duty.