The Blue Moon agency detectives, Maddie and David, get caught on a train for mystery buffs, then find they have a real mystery to contend with when a writer is murdered.

Maddie is glad because the agency has finaly got a good client, RTC, a weaponry corporation. However, her joy turns to disappointment when the CEO fires them for failing to discover who sabotaged a test for military officers. Maddie decides to go on with the case despite David's objections. All the clues seem to point in one direction, a psychic who works for the corporation's rival.

It is Maddie's first day at the Blue Moon Detective Agency but there is nothing to do. In desperation, David 'steals' a client from a rival agency. The man wants them to find his estranged son, but all is not as it seems.