Two twins Arria and Aaron are partners who comit crime in Japan who moved from a planet that scientists beleived didn't exist, Erria. Together they're unstopable.

Haylee moves out of the city and into the country side after her father dies. She meets Rider who lives next next door, but little does she know he's a deamon wolf. After a few months of them hanging out she begin to catch feeling for him, But she had no clue that she was half angel. With Rider being a demon and Haylee being an angel, could they ever be together?