When a valuable painting vanishes in front of dozens of witnesses, the police are baffled. Luckily, famous teen sleuths The Hardy Boys are on the case! With help from their friends, Frank and Joe Hardy set out to solve this apparently unsolvable mystery. But as they investigate, they uncover the strange and terrifying history of the stolen painting, and the bizarre fate of the mad artist who painted it. And they realize that shadowy forces are at work even now, determined to prevent the Hardy Boys from solving the case—by any means necessary.