History comes alive -- with ghosts! Anderson finds himself drawn to the old trunk of military relics in the basement of his family's junk shop again. His friends Greg and Julie warn him to stay away from it, but he can't help himself. This time Anderson discovers an old grenade with a strange message scratched into it. But an old grenade is dangerous . . . especially when the ghost of a soldier appears, claiming that it's his lucky grenade from during his service in the Vietnam War. What does this ghost want from Anderson, Greg, and Julie? Is he here for their help - or for something more sinister? It's a race against time as the friends work to solve the mystery!