Sixteen-year-old Roz is preoccupied with normal teenage stuff: navigating high school friendships, worrying about college, and figuring out what to wear to prom. When her estranged Por Por abruptly arrives for a seemingly indefinite visit, the already delicate relationship between Roz and her mother is upended. With three generations under one roof, conflicts inevitably arise and long suppressed family secrets rise to the surface. Told in alternating perspectives, Age 16 shifts seamlessly between time and place, exploring how this pivotal year in adolescence affects three women in the same family, from Guangdong in 1954 to Hong Kong in 1972, and Toronto in 2000.