Lucy "Halo" Mitchell is the daughter of Captain Pete Mitchell. From a young age, she grew up in the Naval Aviation industry, which she ended up working in. After receiving her doctorate though, she became a scientist and Top Gun instructor.
One summer, her dad was called in to help teach a mission alongside her to a special squadron. Amongst that group was Bradley Bradshaw, the man she had not spoken to since she was a teenager because of a falling out between him and her dad. Tensions exist, but they are not strong enough to deny the love Bradley and Lucy have for one another.
Bradley and Lucy grow close, and he helps overcome her fears of flying. Except one day, Lucy realizes everything he has told her was a lie. She ends up leaving him for DC so she can go back to being a full time fighter pilot. While there, she runs into some old friends, and even makes an enemy or two.
With her new life, she thinks she escaped Bradley entirely, until one day, on deployment, he arrives with a squadron for a special mission.