While camping near Indian Creek, Matt and his best friend, Parker, get up early to see if they can spot a blue heron. Instead, they find the body of a dead man floating in the clear water.     Parker is sure that George Evans, the smooth-talking  local antiques dealer, must somehow be connected to the dead man. Matt isn’t so sure—but then, on Halloween night, while snooping around Evans’s antique shop, the boys make another shocking discovery that puts their own lives in danger.     There are murderous grownups that would do anything to keep what the boys found in the shop a secret, and now they’re after Parker and Matt. Are the boys clever enough to get away? Or will they, too, end up like the dead man in Indian Creek?