For years, they plagued the Flashes - first in Central City, then Keystone City. And then - unbelievably - they were involved in the death of Bart Allen, the fourth Flash and former teen hero Impulse. And they were hunted... ...But now Captain Cold, the Weather Wizard, Heat Wave and the Mirror Master are back, and revenge is on their minds: on Libra, the villain who tried to push them into Darkseid's service, and on Inertia, the teenager who caused the death of Bart Allen. Can they stay alive and away from each others' throats long enough to realise their goal?