Harold Heaven disappeared from his cabin in Minden, Ontario in October 1934. With help from town locals, the 1934 police reports, and his own family and neighbors, Harold's great-great nephew Mike Mildon and Mike's best friend Jackson Rowe are determined to solve this coldest of cold cases, despite the theories growing stranger the further they dig.

The trail leads Mike and Jackson to uncover another suspect - a neighbor who disputed with Harold Heaven over a parcel of land. Meanwhile, suspicions arise over an unusual landmark on the Heaven property known as "The Bump."