Hong Kong, twenty years later. The city is a perpetual construction site where the wheel of development must turn to build more shopping malls and higher residential towers. Enter members of the all-girl pop sensation, Heartbeat 48, an ever-expanding army of eco-warriors who are tasked with checking the heartbeats of centuries-old trees and villages and losing no time to pronounce their deaths. When Doy, an internet nerd and one of the few surviving village natives, is transported from the past ...