The Hardys go to bat against a major league team of counterfeiters! There's trouble in the cards when Frank, Joe and their friend Biff visit a baseball memorabilia convention in New York City. Biff buys a hard-to-find card only to learn that it's a counterfeit and that more than a few bucks are at stake. The card may be a fake, but the danger to Biff and to the Hardys is as real as it gets. Frank and Joe discover that the baseball card scam is just the beginning - a very small slice of a very criminal pie. And when that much is on the line, the Hardys know they'd better be ready to play some serious hardball!