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