Trapped on the D.C. Train KC Corcoran is the President of the United States' stepdaughter. She and her best friend, Marshall Li, are going on a train with the Vice President to Lancaster County, PA. At the end of the train is a special car reserved for the Vice President, the kids, and two secret service agents. After leaving the station, the kids decide to explore and while doing so they notice several suspicious characters on the train. When they return from exploring, they find out the Vice President's car has been unhooked! The kids suspect there are several people involved in the crime since there are several suspicious people around, but who exactly? As if this wasn't enough, some of the suspicious people are searching for the kids! Will they get away? Who's behind all this? Most importantly, where is the Vice President?