Sophie, a normal human with normal problems, unknowingly makes the biggest decision of her life when she takes a night walk through the park. She stumbles upon a swirling mystery that pulls her into new troubles, and a new world. There she finds herself falling into one misadventure after another that leads her into the arms of a handsome dragon.

Euclid is a dragon of high blood, but has distanced himself from his family and birthplace. He returns to his home after a long absence only to find himself the unwilling owner of a newly arrived Maiden, a human woman from the other world. At first he seeks only to find her a place in her new world, but he soon learns that the only place he wants her to be is by his side.

Together they learn to live and love, but a dark mystery blocks out any future happiness for the pair. Shadows lurk in the narrow streets of the bay city and a threat comes from across the sea to do the bidding of a vengeful monster. Their newfound bonds must carry them through the darkness before the shadows sweep them away and into the arms of an ancient horror.