On the fifth anniversary of their friendship, Carly gives Sam a one-of-a-kind iCarly T-Shirt as a gift. Desperate for an attempt to return the favor, Sam tries to buy a pair of hard-to-find concert tickets for Carly's favorite band from a scalper. With no other means to purchase the tickets, she sells him the shirt and puts both Carly's show and their friendship at risk.

Plans for the landmark 50th web cast of iCarly are at risk of being curtailed when Sam gets detention. Realizing she can't do the show without her co-host, Carly and Freddie try to get in trouble themselves, so they can do the live web cast from their school's detention room. However, deliberately trying to get detention proves to be far more difficult than Carly can imagine, and even harder for Freddie.