The Paul R. Tregurtha is the largest vessel on the Great Lakes, a 1,013-foot bulk carrier that hauls coal, iron ore, and stone between American ports. This film follows her crew as they push the ship out for the first run of a new shipping season, a voyage complicated by ice, unpredictable weather, and the sheer scale of handling a vessel that long through narrow locks and channels. Cameras go inside the engine room, up to the pilothouse, and onto the deck as officers and deckhands describe the routines and risks of life aboard a working freighter, from loading cargo to navigating tight passages like the Soo Locks. The film lays out the ship's dimensions and cargo capacity alongside the practical demands of keeping a decades-old giant running reliably, and it treats the crew's expertise, not just the machinery, as the real subject. The result is a close look at an industry most people never see, told through the people who keep it moving.