After vanquishing three notorious Desperados, 12-year-old P.K. Pinkerton opens a private-eye business in Virginia City. P.K.'s skills are quickly put to the test: When a maid named Martha witnesses a murder, she hires the young detective to track the killer before he finds her too. P.K. enlists a trusted ally, Poker Face Jace, to help crack the case - but collecting clues and keeping Martha safe will not be easy. Cunning liars, rogue gunslingers and deadly foes lurk at every turn, and time is running out to bring the murderer to justice.