A millionaire businessman is found dead one year after he disappeared. The team discover that he has been kept prisoner in an underground cellar but the kidnapper made no ransom demands.
On first look it appears that the victim committed suicide with pills. However, questions are raised when another male body is found in the same cellar but appears to have been brutally murdered some years earlier, presumably by his kidnapper.
Retracing the steps of the two men leads the team to an unlikely suspect. The team know they have their man - now all they have to do is prove it. As they collect the damning evidence, their suspect disappears and shortly afterwards, so does his wife. The team realise that the murders took place in order to prevent the truth of the killer's secret life from reaching his wife. In a bid to prevent her being hurt by the revelations, the killer is going to kill his wife.
