The Dragon Doctor's Revenge

Eighteen years ago, Eight Celestial Dragons saved Frederick Jacobs. The Jacobs family promised a marriage. Eighteen years later, the Jacobs family breaks the engagement. Nolan Langdon, a divine dragon descendant with medical skills, comes to break the engagement. He discovers his elder brother, Charles Langdon, was murdered. He joins Susan Sullivan, his sister-in-law, to investigate and avenge his brother. He shatters villains' conspiracies, brings the wicked to justice.