Nak Soo Maha Gaan(2013)

Nak Soo Maha Gaan is a Thai action series following Ritravee, a retired assassin who leaves his violent past behind to teach martial arts in his hometown. When a high-stakes covert operation calls on his patriotic duty, he accepts—only to have the mission collapse catastrophically. A biochemical explosion exposes Ritravee to a supernatural drug that seeps into his wounds, granting him extraordinary powers and transforming him into the Ghost Assassin. Now caught between his newfound abilities and the dangers they bring, Ritravee must navigate a treacherous path where his superhuman gifts become both his greatest asset and his deepest curse. The series explores whether he can master these powers or if they'll consume him entirely.