A detective for a police agency is teamed with a naive new officer, who is secretly an android, and often conflicts with the Assessor's Office and the security forces of "the Consortium", a small number of extremely powerful companies.

In a dystopian mega-city on Earth in 2070, David Hume's a smart dedicated human and his partner, Ian Farve's an android of mysterious origins. The two detectives of Citizens Protection Bureau (CPB) who investigate crimes related to a few powerful companies who control the world.