Two boyhood friends are separated due to the disappearance of the sister of one of them, then later meet again as teenagers, when one of them has become a pop singer, and they discover feelings that they did not know they had.
Khao Niao, a young girl, is left at her relatives' house by her mother. Although she is surrounded by familiar faces, she still feels very lonely and blames her mother for 'abandoning' her here. One day, while wandering around, Khao Niao finds a stray puppy.
In the wake of a deadly SARS outbreak that's turned ordinary folks into flesh-eating zombies, Thailand stands alone as the only nation to block the pandemic. That is, until the virus finds its way into a crowded Bangkok apartment complex.