Love Beyond Frontier

Wang travels to Thailand from Hong Kong to look for his mother.
He bumps into Ple and Win at the airport and exchanges bags with Ple.
Meanwhile, Wang arrived at his mother's house; however, she had moved away. He meets Pat, who is living there instead, and she thinks that he is a pervert. After some mishaps, she lets him live with her.
Win and Ple have been best friends since childhood, but Win is secretly in love with her. Circumstances let these four meet again and live in the same building. Ple seems interested in Wang. What will happen next?