It may be winter, but things heat up when Police Chief Lew Ferris discovers a mystery buried under the icy waters of a local lake. It's ice-fishing season in Loon Lake and Doc Osborne is trying to convince Police Chief and fishing pal Lew Ferris to give it a chance. But fish aren't the only things lurking below the surface. The bodies of two snowmobilers have just been pulled out of nearby Two Sisters Lake. And a beautiful woman's corpse turns up in a snowdrift. Is it payback for a drug deal gone bad? Or is it something more sinister? Osborne and Ferris once again team up to get to the bottom of a very murky mystery.