Bull's-eye revenge Frank and Joe take on the case of Denny Payson, a friend who suspects that his father was murdered in a chemical plant fire five years ago. Lucius Crowell, owner of the plant, has taken care of Denny and his mother since the accident, but Denny is convinced that the fire was a cover-up for the factory's dirty secret. Now Crowell is running for public office, and Denny, an expert spot marksman, is determined to have his revenge. Nothing Frank and Joe say can convince him to give up his murderous plan. But another crack marksman - a hit man - is after Denny. Can the Hardys save Denny before he turns on them?