A year after the mystery that changed everything for Catherine Allingham, the world's greatest detective returns with a new chilling case. Residents of Mountain Oak are turning up dead with each victim leaving a different death clue at the scene of the crime. Catherine and her new assistant Adrianna are on the case. But why doesn't Catherine remember her former partner, James Doyle, and with suffering from a brain tumor, how has she overshot her expiration date of six months by a year?
