Deaths Kiss

Ghost is 26, Dead is 24, König is 28.
A military mercenary with the code name Dead, is being released from her psychiatric ward.
She's part of a mercenary group named Undead. As a young kid she got abandoned at an orphanage. Not too long after she got adopted by the military to test a new super solider drug. After an unfortunate accident her childhood fellow orphan friend died during a battle leading to an opportunity for the government to put a spy in the mercenary group, Ghost.
With Ghosts body cam and Deads trust and closeness in him he was able to help shut down and lock the group away. Now present day Ghost has to testify, which is where this book starts. More on their relationship will unravel and she'll meet her new obsession soon.