After the ruler of Dahla is assassinated for opposing drug traffickers, Chao Suea Phiangfa returns to govern the peaceful border city. As he intensifies the fight against criminal syndicates using Route 4 to smuggle drugs into Thailand, he must protect his people from enemies determined to preserve their illicit empire.

Phutanate Hongmanop
Suea Piangfah / Karamet

Phiyada Jutharattanakul
Wansai
Chinnit Bunnag
Chana

Atthaporn Teemakorn
Ja Subin

Arisara Wongchalee
Sot / Suchada

Sivawong Piyakesin
Per

Phollawat Manuprasert
Samkan

Worachet Nimsuwan
Sammai

Sarut Vichitrananda
Atchasan