A bike trip in the country leads to a dangerous twist as Nancys ride takes a sudden, nasty turn. After catching a jewel thief in the act, Nancy hopes to steal a little time for herself. A three-day bike ride with Ned, George, and a group of Emerson College students seems the perfect escapeuntil a series of accidents puts them all on a definite downhill course. And to add insult to injury, the rider most at risk is Nancys friend George! But why would someone want to harm Georgea girl who has never hurt anyone? Nancy knows shell have to find answers quickly before the trip takes a dangerous detour and her friends ten-speed spins out of control. A deadly secret has come along for the ride, and getting it out in the open may be the only way to save Georges life!