The Justice League faces a strong new risk — the Deadly 5! Superman, Batman and Marvel Lady search solutions because the time-traveling trio of Mano, Persuader and Tharok terrorize Metropolis seeking budding Inexperienced Lantern, Jessica Cruz. Together with her unwilling assist, they goal to free remaining Deadly 5 members Emerald Empress and Validus to hold out their sinister plan. However the Justice League has additionally found an ally from one other time within the peculiar Star Boy — brimming with unstable energy, might he be the important thing to thwarting the Deadly 5? An epic battle towards final evil awaits!