Jim decides to beef up security at an auction where a famous diamond is to be sold when a notorious jewel thief, Philippa Vale, who has never been caught decides to visit Jersey.

An eccentric old lady's mysterious past is somehow tied to a sunken ship that has attracted many divers, including a world-renowned underwater archaeologist and a notorious gangster.

Jim gets involved in a murder while matching wits with Phillipa Vale.

A business acquaintance of Charlie's is suspected of insider trading.

When a fugitive from South Africa appeals to Karen Markham for help, she finds herself caught up in something she cannot control.