Someone's come up with a way to turn ordinary citizens of Gotham City into undetectable walking bombs... and only Black Canary (a.k.a. Dinah Laurel Lance), Starling (a.k.a. Ev Crawford) and new team member Katana (a.k.a. Tatsu Yamashiro) can stop them. But will Canary's choice of a fourth team member, a notorious bioterrorist, tear them apart first?