While the heart of The First Deadly Sin is a detective crime story, part of the movie is a tender and unusual romance. Frank Sinatra stars as a tired, not very young detective who tries to solve a murder he's been given very few clues to go off of. Sometimes in detective movies, once a clue clicks into place, an arrest is quickly made afterwards. In this one, Frank and his co-workers exhaust themselves to find out exactly what a clue means, and how to prove it actually is a clue, which is both realistic and well written.
When not on the clock, Frank visits his wife Faye Dunaway in the hospital. She's had a difficult operation, and their scenes together are tender, sad, and touching. He brings her little presents, she tries to seem like she has more strength than she feels, and the audience can see both their pain. These scenes, although terribly sad, are the best parts of the movie. But it also makes for a pretty heavy storyline, so if you're going to watch this one, make sure you have some Kleenexes nearby.
When not on the clock, Frank visits his wife Faye Dunaway in the hospital. She's had a difficult operation, and their scenes together are tender, sad, and touching. He brings her little presents, she tries to seem like she has more strength than she feels, and the audience can see both their pain. These scenes, although terribly sad, are the best parts of the movie. But it also makes for a pretty heavy storyline, so if you're going to watch this one, make sure you have some Kleenexes nearby.