Scott Lang and Hope Van Dyne are dragged into the Quantum Realm, along with Hope's parents and Scott's daughter Cassie. Together they must find a way to escape, but what secrets is Hope's mother hiding? And who is the mysterious Kang?
Still reeling from the loss of Gamora, Peter Quill rallies his team to defend the universe and one of their own - a mission that could mean the end of the Guardians if not successful.