Once known as BLACK CAT, Train was the former ace assassin of the secret organization CHRONOS, responsible for eliminating countless political figures. Rumored to have been killed for betraying the organization, he unexpectedly resurfaces two years later, now working as a "bounty hunter." Partnered with Sven, a former international investigator with the power of "Dominant Eyes," and joined by the money-obsessed disguise expert Rinslet and the nano-bioweapon Eve, he sets out to find his former partner Creed, seeking to settle the score from their unresolved conflict two years ago...