When a wave of anti-matter threatens all life in the multi-verse, The Monitor gathers seven heroes - Supergirl, The Flash, Green Arrow, Batwoman, White Canary, The Atom, and Superman - to face the crisis. Daunted by the odds, the team seeks out new recruits, including a mysterious Kryptonian. Pariah enlists Black Lightning's help after Flash-90 shares the hard-won knowledge he acquired in the battle of "Elseworlds" and with the help of Black Lightning, Barry, Cisco and Killer Frost, the heroes devise a plan that may save reality.
