[1][2] The film tells the story of Mei Li (Cris Horwang), a thirty-year-old woman feeling desperate about being last among her friends to marry, and her relationship with Loong (Theeradej Wongpuapan), an engineer working on the BTS Skytrain system.

The skytrain, which celebrated its tenth anniversary the same year and lends its name to the film's Thai and English titles, is prominently featured throughout the story.

When she reaches home, her family scolds her and bans her from driving, forcing her to commute by public transport.

She buys Loong a new pair of sunglasses and writes her phone number on the box, hoping he would call her.

After waiting in vain, Li and her neighbor Plern (Ungsumalynn Sirapatsakmetha) meet Loong at the video rental shop he frequents, and the flirtatious Plern cleverly obtains Loong's phone number and learns that he is a night shift engineer for the BTS Skytrain.

However, Plern refuses to give Loong's number to Li, and instead becomes a cashier at the video rental store.

In retaliation, Li summons Plern's three boyfriends to the store, causing a ruckus that Loong gets caught in resulting in the smashing of his laptop.

Feeling responsible, Li take Loong's laptop to Ped's husband, but he can't fix it.

Li has the film printed, and finds there are pictures of Loong with Kob Kavita (Taksaorn Paksukcharern), an actress in "Saint's Tear", a popular television series.

When the skytrain arrives at Ekkamai Station, Li suggests that they watch the stars at the Bangkok Planetarium and see an exhibition about a comet that will be appearing soon.

Bangkok Traffic (Love) Story was sponsored by the BTS, and the movie includes many scenes depicting maintenance work on the system and its infrastructure.

He noted that Cris skillfully represented the humorously exaggerated single urban female in her lead role, but criticized the film for its weak and loose plot.

[5] Nantakwang Sirasoontorn observed in Kom Chad Luek that the film's most distinct theme was that of the female fantasy of meeting the perfect man.

He noted that images of contemporary Bangkok life and GTH's carefully planned marketing campaigns helped propel the film to success.