When ice cream factory manager Rose finds owner Robert frozen to death in one of his walk-in freezers, Jane and Davey are called in to investigate. Rose is adamant that Robert wouldn't have killed himself as he was in the process of selling up and retiring. Davey questions Robert's beautiful new young wife Christine at her stunning seaside home, why didn't she mention that she went to the factory last night? Christine blames the shock and deflects on to Robert's son Andrew, who only yesterday told Robert to drop dead after his allowance was stopped. Davey is charmed by Christine but Jane is left suspicious. When the post mortem reveals that Robert was sedated before his death, Davey pursues Andrew as his prime suspect. However Jane learns from Rose that both Christine's previous husbands had died under suspicious circumstances - could Jane be dealing with a black widow?