The Prototype of Grand Templar and Mentor Assassin

When Alexander J. Mercer dropped the nuclear bomb in the ocean, he did not expect to be sent back in time to 18th century where the Revolution would soon begin, and got into the secret war between Assassins and Templars. The worst part was that the two men he came to care were at each other's throat, both because of personal and duty matters. And he was stuck between them.