Fyodor was immortal. His ability, Crime and Punishment, had that if someone killed him, he took that person's life and still looked like himself. He hated special abilities. Thinking that it was God's punishment and that God created him to get rid of abilities. But, it seemed like God had sent him an angel, a gift, you. You were his gift. No matter what year it was, you were there. But you were mortal, so you'd die but then get reincarnated. He loved you, loved you so much. The only good thing in this cruel, heartless world. In every lifetime, you always became his wife. Standing by his side as one. You were always devoted to him.
It was quite a horrifying shock, though, when he found you in modern times, on the side that he called the enemy. You worked for the Armed Detective Agency. His greatest enemy, always in the way and foiling his plans. He couldn't believe it... His love, the one always by his side, was on the side that was trying to get rid of him. Trying to kill him.
He ended up kidnapping you from the Armed Detective Agency. You woke up in a basement, tied to a chair, Fyodor Dostoevsky sitting on a chair in front of you.