Ex- private detective Nick Charles returns to New York with his wife Nora (and dog Asta) for what he thinks will be a brief Christmas holiday, and a chance to catch up with old friends. When he bumps into Dorothy Wynant, daughter of Nick's old client Clyde Wynant, she asks him to track down her father, the titular Thin Man. Nick does his best to avoid getting pulled back into detecting. But the murder of Clyde Wynant's secretary Julia Wolf drags Nick further and…