The U.S. Avengers have a new mission—to find their missing teammate! Squirrel Girl, Red Hulk, Iron Patriot, and more head into outer space to find Cannonball! The search leads them to strangest planet of all... Glenbrook, U.S.A.! Home — and fiefdom — of Ritchie Redwood, America’s best loved teen! What shocking events will lead the U.S. Avengers to uncover the secrets of the seemingly idyllic planet of Glenbrook whose teenagers keep disappearing? And how will this lead them to Cannonball?