In this climactic final adventure, the Bombshells face their biggest, most cosmic threat ever. It's 1944, and all is not well on the home front. Black Canary's popular pirate radio broadcast has started mysteriously brainwashing everyone who listens to it... including some of Gotham's very own Batgirls. Now, to save their friends, two young vigilantes will have to trace the transmission to its source--in Hawaii!