Khun Nai Sai Lab

At a famous hotel in Lamphun, Wichai, the hotel owner, is welcoming a large tour group from Bangkok. By his side is his young wife, Lisa, dressed in flashy makeup and eye-catching outfits that draw everyone’s attention.
Among the guests is Sinthop Rujikorn, the heir to a resort, grape-processing business, and vineyard. Having just returned from abroad after completing his master’s degree in business administration, he comes at the invitation of his close friend Winthai, Wichai’s son. Sinthop is also considering working there to gain experience before returning home.
Seizing an opportunity, Lisa slips away to Wichai’s office to secretly copy data about his drug-trafficking clients as evidence. Sinthop, who has never trusted a beautiful young woman married to a much older man, follows her and deliberately interferes with her actions.
But Lisa is not who she seems—she is actually Police Lieutenant Rekhakhaneet Ravipriya, an undercover officer on a mission…