In London, the Metropolitan Police set up a new Unsolved Murders Unit - a cold case squad - to catch the criminals nobody else can.

In Geneva, millionaire art collector Miles Faulkner - convicted of forgery and theft - was pronounced dead two months ago. So why is his unscrupulous lawyer still representing a dead client?

On a luxury liner en route to New York, the battle for power within a wealthy dynasty is about to turn to murder.

And at the heart of all three investigations are Detective Chief Inspector William Warwick, rising star of the Met, and ex-undercover operative Ross Hogan, brought in from the cold.

But can they catch the killers before it's too late?