I get why you don't want to join.
Oh, no. I will join you, Vimes. But I'm never wearing the badge.Captain Sam Vimes and Lady Sybil Ramkin, "The What?"
She has been through a lot and states that she's learned from it that you don't need a badge in order to make a difference. She is skilled in the use of weapons and is also surprisingly talented singer. She keeps a small pet dragon named Goodboy. She believes that no matter how bad things might seem, there is always someone out there that will notice the small kindnesses, someone who will help when you least expect it.
In her youth, Lady Sybil Ramkin once returned home to find both of her parents dead, apparently victims of murder. She contacted Corporal Cuddy of the City Watch, but upon a brief investigation, he presented her with a "Receipt of Legal Inhume." He told her that her parents had been killed by a member of the Assassins' Guild and that there was nothing else he could do to help her, as the killing of her parents had been prefectly legal.
Many year laters, wanting information on the apparent return of the supposedly deceased Carcer Dun to the city of Ankh-Morpork, Captain Sam Vimes seeks out Lady Sybil Ramkin but ends up in a student in her group, the "Sunshine Rescue Centre for Broken & Bedraggled Things." There, he learns that she is a "terrorist" who is trying to reform members of the city's various criminal guilds who have been "brainwashed into believing that crime is a legitimate profession." He explains to her that he is not a criminal, but actually the captain of City Watch. The two make an uneasy alliance and together investigate the death of an alchemist, learning about recent trafficking in the illegal narcotic "Slab." Their investigations lead them to the discovery of the lost library book that Sam Vimes was tasked to find by Lord Vetinari and, with it, Carcer Dun.
Impressed with Ramkin's skills, Vimes offers her a job as a member of the City Watch. At first it seems as though she is going to refuse his offer. She tells him, however, that she will join them, but that she will never wear the badge of the group. She then proceeds to assist them with their latest investigation, seeking the sword Gawain inside the headquarters of the Assassins' Guild while they take on the roles of musicians at the next door Musicians' Guild, until she is able to find the means to let them in. While doing so, she also investigates her own personal vendetta, seeking and finding the man who killed her parents, Inigo Skimmer. In the process, she discovers that he is guilty of tax fraud and manages to get the Watch to arrest him on these charges, even as they discover that someone else within the Assasssins' Guild stole the sword from the statue of King Vetrick I many years before.