Tharn and Phaya first met as kids when Tharn saved Phaya from drowning in the Mekong River and gave him a necklace to cement their new found friendship. While in the river, Phaya saw a strange serpent and ever since then he has been hearing strange whispers and voices, and a recurring message about an unknown woman through his dreams and nightmares. Meanwhile, Tharn has grown up with a natural sixth sense, and when he was first presented with the necklace that he later gave to Phaya, he was told he would instinctively know who to give it to when the time was right. It was a significant bond between them and their friendship grew into one of unbreakable love. Now, Tharn and Phaya are reincarnations of their past life; brought together again by the strength and evolution of their love, and in their present roles as partners in the Special Investigations Unit, their bond is about to be tested once again by a mysterious psychiatrist."