Mira James's hot and heavy relationship with boyfriend Johnny Leeson is definitely warming up her winter. But when Johnny has to go to Portland, Oregon, for a month-longth internship, airplane-averse Mira lets her septuagenarian friend Mrs. Berns talk her into a visit. On the plus side, Mira can make the trip a tax write-off by attending the International Private Investigator Conference. On the down side, Mrs. Berns books them--much to Mira's dismay--on the Valentine Train, a place for singles to meet and mingle. After a few glasses of champagne and Mrs. Berns' encouragement, Mira begins to relax and enjoy herself--until a fellow passenger is murdered and a snowstorm traps the train in the Rockies.