Alone in a new world with only the clothes on his back and the ring on his finger, Tetsuo wants nothing more than to go back home to his wife. Stranded in a city of knights and magic, he quickly learns just how disadvantaged he is as a regular human from Earth. With his options limited, Tetsuo must seize every moment to avoid complacency, while denying this world as his own.

Plucked from his life without any warning, Tetsuo must find his place within the Kingdom of Alvania and uncover the mystery behind the summoning phenomenon, if he ever wants a chance to reunite with his beloved.