Jao Sua Leng, heir to the Mongkorn Waree empire, survives betrayal and a massacre that takes his wife and child, entrusting his unborn heir with the family’s red dragon jade before being separated from them. Twenty years later, Yok, an orphan raised in the slums with only the jade as a clue to his past, prepares to graduate from the Royal Police Cadet Academy, unaware of his true legacy and the dangers tied to it.