Ruadh Douglas doesn't want to go home. Years on the battlefields for the glory of the king have made him more beast than man and he won't inflict his wounded mind and soul on his family. So, he wanders the streets of London, performing penance by rescuing those in need.

Rosalind Ransome is a misfit in London's ballrooms, but in visiting the sick of all classes, she has found work she loves and the chance to make a difference. When she is attacked in the streets, she is rescued by the vigilante they call the Wolf.

Rose is drawn to Ruadh when he seeks her family's help to free his ailing grandfather from a treacherous wife and servants. But is he the loving grandson? Or the wolf who patrols the streets at night?