After getting expelled from his foreign school due to a dispute, Ai is compelled to return to Thailand by his father, where he enrolls in classes at the university where his father teaches. It is there that Ai meets Chen Nhai, his classmate who rides a Harley Davidson and possesses an intense fascination with a yellow duck keychain. Ai is immediately smitten with Chen Nhai, and the two embark on a whirlwind romance.