An urban love story set in the center of Bangkok where thirty-year-old Mei Li struggling to find true love. When Mei Li accidentally meets a handsome BTS engineer whom she conider as the right man, she plan to make her firt move. Though too many obstacles keep popping up, Mei Li will never give up.

Hot lost dog topic , the whole city , the 2009 champion of the Thai film at the box office list for Thai Star Pics Film Award for Best Actress nomination the Thai Komchadluek Awards for Best Actress , Best Film nomination Thailand Top Awards, the audience voted most popular film . the most popular actor Thai media Choice Award for Best Film, best Actress , best Actor over 30 years left women ( loser dog ) Merry Valentine's Day encounter looks handsome in the BTS ( Bangkok Mass Rapid Transit light rail ) engineer uncle she believes that God has given her Valentine's Day gift , so plan to initiate the pursuit of the offensive to end the single life of up to 30 years . But as the program progresses , Merry stand in between them is not only a difficult day and night to meet an embarrassing state , even the neighbor's younger sister also seems to her , it seems the entire city in the way of her the road to happiness . Next before the arrival of Valentine's Day , Merry whether his wish, to get the first love of her life ? Let us look a little love left women lost dog , how in this city , in good faith and adhere to , and eventually find their own happiness .