Spoiled celebrity heiress, Chelsea Prince, is kidnapped from the back of her limousine. Her driver receives life threatening injuries in the attack, but is able to make an emergency call before he passes out. The team finds that Chelsea has a complicated social life and they initially suspect that this may be responsible for her disappearance. However, following a recent spate of selfless behaviour on Chelsea's part, they are forced to think again. They are shocked to discover that Chelsea's kidnapper has posted video footage of her, tied up and crying, on the internet, and that he has started an online poll for the public to vote whether she should live or die. After some intense detective work, it emerges that the key to solving the case, and finding Chelsea alive, may lie in some fan letters, written to Chelsea by a 12-year-old girl. Meanwhile, Vivian's heart condition is causing her trouble.