Black Cat (manga) - Plot

Plot

Chronos, an organization bent on world peace, rules one third of the world's economy. To maintain the balance of the world, Chronos is therefore essential, and there is a need for people to protect Chronos. Thirteen special elite assassins each possess unique orichalcum-forged weapons and are called the Chrono Numbers (時の番人, Kurono Nanbāzu?), assassins who work for Chronos. When the thirteenth Chronos Number (Train Heartnet), also known as the infamous Black Cat, meets a Sweeper (licensed bounty hunter) named Saya Minatsuki, Train's morals and values are changed from those of Chronos's to those of his own. Instead of killing his victims like he is ordered to, he merely uses Hades (his orichalcum gun) to stop them instead. This leads to tension between him and the Chronos Elders, the leaders of Chronos, and eventually culminates in Train's departure from the organization. Creed Diskenth, a Chronos assassin, resents the way that Saya changed Train's life, and murders her. Two years later, Train is an easygoing Sweeper, traveling with his partners Sven Vollfied (who possesses a special eye that allows him to see a few seconds into the future) and Eve (who contains millions of nanomachines in her body, allowing her to transform herself at will), when Creed appears before Train once more. Creed, now with followers and power that rival anyone alive, including the numbers, vows to get Train to join him. Train must choose his friends and new life, or revenge, as Creed threatens to undermine Chronos and start his own World Revolution.