The USNS Comfort began life as an oil tanker before the US Navy converted her into a floating hospital, and this film goes behind the scenes as the ship sails through the Panama Canal on a mission to deliver medical aid to communities across the Caribbean. Cameras follow the crew through cramped engine rooms, operating theaters, and wards built into what was once cargo space, showing how a vessel designed to move oil now moves surgeons, dentists, and medicine instead. The voyage does not go smoothly: mechanical problems, tight scheduling, and the logistics of treating patients in ports with little infrastructure all complicate the mission along the way. Interviews with crew members explain the ship's engineering history and the day-to-day work of keeping a decades-old converted tanker seaworthy while running a functioning hospital aboard it. The film is as much about naval engineering and improvisation as it is about the aid mission itself, using the Comfort as a case study in adapting industrial-scale ships for humanitarian work.