Presents two episodes originally broadcast on the television program Sport diver. One is a visit to dive sites at Port Hardy located at the northern tip of Vancouver Island in Canada's Pacific Northwest. The other shows the sinking of the Canadian Navy destroyer HMCS Mackensie as part of an artificial reef project, and dives to other shipwrecks in the Broken Island Group in Barkley Sound. The feature programs are supplemented with additional information in the form of trivia questions and text screens about a famous dive site and diver, and about diving equipment.