Roar is a superhero. Born of a single mother and a sperm donor, she was gifted at birth with inexplicable muscle density that gave her great strength and speed. Choosing to forgo a costume, she lives without a secret identity.
Living as an “outed” superhero isn’t easy. The cops won’t accept her. Footgear won’t take no as an answer to their endorsement opportunity. Plus she faces the same challenges of any single woman. Like convincing her mother why she needs her own apartment and dodging her aunt’s efforts to set her up. After a bad break-up she’s focusing on being happy as a single superhero.
(your hook starts here)
When an explosion at a health clinic almost kills the city’s new mayor, Roar is hired as a bodyguard. Rayce Marquest is a dynamic politician committed to reforming the city’s healthcare system. A champion of holistic medicine, he believes his vision for reform has made him a target.
Roar’s good-guys-versus-bad-guys view of the world is rocked when she learns that the man the mayor believes is out to destroy him is her ex. The ex she’s still in love with.
Archer Galen is a pharmaceutical mogul who believes in better living through subscription drug use. He’s not out to kill the mayor. Although his personal secrets drove Roar away, he now needs her to trust him as people across the city are mysteriously dying from his drugs and he suspects the mayor knows why.
You've got a run down of the plot here not a hook. I'd focus less on the superhero stuff and just make it one of the quirky things about Roar (that name!) and incidental to the plot. Sort of like the stuff that goes on in the background of great comic movies.
Reforming the health care system is probably the weirdest murder motive I've seen all day but if you can make it work, more power to you.