A hair salon apprentice accidentally saves a gangster's life — an act that helps bring in new clientele and drops her into a world of chaos.

It's the day before Hsiao-Chun's 18th birthday but she overhears a secret which will change the way she looks at her family. As the candlelight on the birthday cake glimmers before her gloomy heart, what wish will she make?

Elder sister, Spring, seeks her origins before heading to university, Autumn, the mother, grapples with conceiving a child through artificial insemination, Summer, the younger brother, tries to engage with a paternal figure he barely knows just before his military service, and Winter, the father, desperately tries to change his fate as problems mount up.