A teen boy and girl were revived after an unknown organization found their bodies after committing suicide from depression from the lost of their family.

This organization now keeps them prisoner and has them do their bidding to get rid of demons gone rogue utilizing the power of demons within them. The boy becomes Kamen Rider Vail and the girl becomes Kamen Rider Dreadvice. A voice they've heard in their own minds told them that two demons were responsible for their families deaths.

With their memories been erased after being revived and no memory of their own names, they're are forced to cooperate with this organization. However, the more demons that they destroy, the more they become demons themselves. Until one day when they lost control and were buried under rubble, they met two people who never saw them as demons. A girl who is a owner of a bath house, and a boy who is an employee of that bath house.

Could these people truly give what these two have lost?