Two most untrustworthy and dangerous things are Woman and Viper. But being together turns them into one fascinating beauty that could make a guy become enchanted.

On the bus heading to an antique graceful Thai House by the waterside in Suphanburi, Chanachol falls into a strange trance. After graduated from abroad, he has shortly become a successful businessman.

He is a married man with a son at the lovely age and seems to be perfect in everything. Yet, he feels he is lacking of something in his life .. something that he does not know what it is .. something he believes to complete his life .. something that brought him to this Antique Thai House ..

His drift is interrupted by the vigorous voice of Mekhla, a young lady guide who is entertaining and giving information to her tourists, she is also an owner of the antique Thai House where she is taking them to visit. Mekhla is not Chanachol's type of woman -- too dashing, too charming -- until the tour gets to the Thai House where Mekhla is attired herself in traditional Thai costume, Chanachol could barely recognize her at his first sight. And from then on, his life is changing and will never become the same.

Mekhla spend her life living in Bangkok and this Thai House where she lives with Lung Tim, Pa Dub, Naul, and a mysterious Cobra who is both a host and an unwelcome visitor. The black Cobra lives in this Thai House for eras ,eversince Mekhla was a child and moved to this provincial house with her mother, Koshum.

Koshum is the fourth mistress, Mekhla remembers how her mother was treated torturely by other wives of her philandering father, Mae Chua, Mae Ning, Mae Sai, when her mother and herself has firstly moved here. Hence, with Koshum's art of passion serving him the sexual satisfaction, everything is changed. The father gives Koshum all the properties -- and that's when Mekhla won over everything and lives in the house happily.

Mekhla meets Chanachol again in Bangkok. Trying to secretly keep the feelings, however, they both feel how they desire for each other. Eventually, the moral that they had before is slightly misjudged and nothing could stop their passion.The night at the Thai House where Chanachol feels surreal connected to,he and Mekhla falls into the very intimate relationship.

Chanachol almost has to compensatethis happiness forhis life when the black Cobra furiouslychases him up with an unusual revenge.

Mekhla knows that the relationship between her and Chanachol cause the Cobra 's revenge to kill Chanachol as it happened before with Poj, a well-known guy in town who once had fallen into Mekhla's captivation and paid his desire with his life when he decided to defy the Cobra.

Mekhla tries to drive the Cobra away from the house and her life, he-- the Cobra never confront her, but be all around her and the house as always.The secret relationship between Mekhla and Chanachol is broken to Maikaew,a wife of Chanachol. She gets very upset and angry.

Mekhla realizes that her immoral love is over. She decided to leave Chanachol and go abroad, she'd rather to be apart from him although it would hurt her a lot and cause her so much pain.

Not able to overcome the obsession, Chanachol goes back to the Thai House where he believes to fulfill his life knowing her furious Cobra is awaiting for him.