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! And they're not the only ones looking for Black Canary. The Suicide Squad is in Honolulu, too, and they want to question Canary in the disappearance of Oliver Queen! But Black Canary says she's not behind the mysterious signal, and she'd never hurt Oliver Queen. The only thing to do is to team up and find the source of the mysterious broadcast together ... but what these Bombshells find is much bigger than a hijacked radio wave and a missing boyfriend. There's a force from beyond that wants to take advantage of the world at war to subjugate humanity. And unless the Bombshells can stop it in Hawaii, that's exactly what it will do! In this climactic final adventure, the Bombshells face their biggest, most cosmic threat ever, courtesy of writer Marguerite Bennett (Batwoman) and artists including Sandy Jarrell (Batman '66), Aneke (Gotham City Garage) and many more! Collects Bombshells: United #13-19.