Do not bite at the bait of pleasure, till you know there is no hook beneath it.

Satan had been patiently waiting for the time when smartphones utilized artificial intelligence to assist users in their daily lives. That time is now. A hard-nosed blonde investor and demon-worshipper steps in to take over Eden Coaching Systems to do Satan's work.

As the story unfolds, Eden's "Coach" device becomes more and more an instrument of evil, wreaking havoc on all of the unsuspecting users.