Join the last Assassin, Tesla Nightclaw the Umbreon, on the most dangerous journey he will ever make.
Some unknown group, known only as the 'Black Shadow', has annihilated both the Assassin's and the Templar, leaving only one member of each group alive; Tesla, and a veteran Templar named Emily Renekta, an Espeon. When their paths cross a few weeks later, they both decide to team up to try and identify this new threat and take it down before it destroys everything.
However, the two lonely renegades soon become close, and they realise they must learn as much as they can about this strange enemy, or face utter destruction. With only a handful of allies, they must fight not only for the world, but for each other, as there is nothing as powerful as love and vengeance.