The Thangarians, Hawkgirl's people, arrive on Earth to aid them against the menace of the Gordanians. But all is not what it seems.

The League manage to escape and take refuge at Wayne Manor, while the Thanagarians scout the planet for them and realize their master plan for Earth.

The League defeats the squad of hawkmen sent to kill them at the Batcave, but must now figure out how to stop the activation of the hypergate before it destroys Earth.