This isn't the first time we've read about a holy knight from a secret order who thought they were the good guy but then discovers that they're also killing innocents. Reason enough to abandon the order and try to disappear into normal society, only to pick up the sword again in order to right all the wrongs. But Stewart manages to breathe new life into the trope with colorful characters and some great world building. This is an urban fantasy with magic, mythological beings, spy tech, and some LGBTQ+ Pride.