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Yai Weroj, a young accomplished policeman is moved from the frontier to be the new chief inspector at Phra Lan Provincial Police Station, Phra Kamphaeng Province. Phra Lan is a remote area and full of illegal business and corruption in civil service circles. He tries to solve crimes and be a good role model for other policemen. He has Kampaeng, a beautiful wife who always supports him, as well as Pittayatorn, a greenhorn young policeman to assist him.