Boxing Day shows the day when Irish middleweight Walter Cartier faced middleweight Bobby James at the peak of his career (April 17, 1950). The film opens with a brief narration about boxing history, and then filming a day for Cartier (with his brother Vincent) as he prepares for the 10:00 match. He had breakfast in his apartment on West 12th Street in Greenwich, then went to morning mass and had lunch at his favorite restaurant. At four o'clock in the afternoon, he began to prepare for the game. At 8 p.m., he waited for the battle to begin in the dressing room of Laurel Gardens in Newark, New Jersey. Finally, we saw the process of the fight, and Cartier won in a short time. The difference between the 12-minute version and the 16-minute version is that the latter has an opening narration (4 minutes) about boxing history, which is pronounced by veteran newscaster Douglas Edwards in a serious, slightly dark humorous tone.