A hostage situation at a supermarket changes everyone's lives.
Leslie holds a sex-education class following an STD outbreak among senior citizens in Pawnee; when Tom's gadgets are taken away, Ron helps him acclimate to life without technology; April and Ben meet Congressman Murray.
Betty's new perfume has some unexpected effects; Claire takes the stand in Fey's murder case; Wilhelmina takes action to become a member of the Meade clan.
A power outage forces staff members to use their wits to save vulnerable patients; a comatose patient is assaulted in the hospital.
Cheryl urges Jim to behave on St. Patrick's Day and forgo his annual law-bending "Green Man" routine so she can assure herself an appointment to the church committee.