Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.

Heung Wing has been sensitive to paranormal activity and keeps seeing ghosts since he was a kid. One day, Heung Wing receives news that his mother is in coma after committing suicide, which forces him to return to the old home. Everything seems strange and weird.

In a world split by a gravity wall where time moves differently, a woman from the Aurora Zone and a man from the Evergreen Zone fall in love, despite the impossible challenge that one day for her equals one year for him.