Jack Castle, private eye, is looking forward to a quiet day fishing on the River Thames, while evading his debt collectors. Last month's bills were covered by a generous fee from a wealthy client for finding an antique jade rabbit figurine. His current client is an eccentric lady who has lost her prize-winning Khao Manee cat and is paying Jack a big retainer to cover his expenses for the next month. But Jack Castle's luck may have finally run out, when he is framed for murder and that the case of the jade rabbit wasn't quite as simple as it first appeared.