When a customer leaves a $100 gift card as a tip, Bob, Linda and the kids go on a $20-each shopping spree, and Gene has an awkward run-in with a former friend.
To take advantage of a work policy granting leave in the event of a pet's death, Peter adopts the oldest bird he can find... and realizes it used to belong to Hitler. Meanwhile, after giving Stewie a signed copy of his book, Brian finds it in a free library, causing Brian to give up writing.
Lois is blocked from a vacation rental app and accused of stealing after the family's trip to Nantucket. Meanwhile, Stewie and Brian buy saltwater taffy in bulk, and try their hands at door-to-door sales in the community.
The NCIS team is tasked with assisting NCIS’ cold case homicide unit with a case from 2003 and a missing Navy petty officer. Also, Kilbride and his son, Alex, work to rebuild their relationship.
The task force investigates a series of social media conspiracies that simulate dangerous public attacks. When a top-secret government program is stolen, the team works to uncover the Troll Farmer's involvement.