When a stolen ancient artifact linked to a long-lost metahuman civilization surfaces on the global black market, master strategist Bane and legendary assassin Deathstroke are hired by rival factions to retrieve it. Forced into an uneasy alliance after uncovering a conspiracy orchestrated by the cult leader Kobra, the two deadly mercenaries must battle assassins, secret armies, and their own violent pasts as they race across the globe to prevent a power capable of reshaping civilization from falling into the wrong hands.