The mystery of 'The Mantuary'... Since the untimely death of hersister, Lisa Sheild has carried the weight of her mother's ambitions for bothdaughters - but marrying Bruce Carter was never one of them... Unhappy about Lisa's suddenengagement Maggie begins to harbour suspicions about her 'perfect' son-in-lawand the worrying changes wrought in her daughter. Is this man really the lovinghusband he appears to everyone else or are Maggie's suspicions justified aboutBruce Carter and a locked room known as The Mantuary?