Cheng (Andy CHOI), who goes to college in Boston, returns to the muggy Guangzhou on his final summer break. To his dismay, his maternal grandfather has died but no one in the family, including his mother (Crystal LEE), is willing to talk about it or their feelings. His elder sister Yam (Isabelle CHAN), locks herself every day in her room and smokes.  ​His father (James AU) is always busy on the phone to take bets from sports gamblers. The family of four will soon move to a new place, but a shadow of estrangement looms above them. Getting drenched in sweat, sometimes by rain, Cheng discovers a melancholy reality, both old and new, in a city he calls home.