[from "throne of glass" series]
Dorian, sent him here. On other continent. In this place, Chaol was supossed to find some healer who could help him.
After many horrible accidents, deaths and overthrowing of King, he almost lost his life. It was a miracle, that he survived. Unfortunately, he lost control of his legs and lost the ability to walk. That was nightmare for him.
Chaol was supossed to help his friend in their kingdom. There were many problems to solve, but after he became invalid, he felt too much useless.
It was right decision to travel here. Only in Torres, he could find a healer that could help him. Only that healer can bring back his health and hope. With their help he could walk again.
And that's how he end up, in front of a big tower, where many healers were living and taking care for people, doesn't asking for paying.