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.

As Jun waits leisurely to enlist in the army, everything starts to go sloppy after two lines appear on his girlfriend’s pregnancy test. Jun, who lost his father as a child, is at a loss because of his sudden “fatherhood”. Meanwhile, his mother Jia-ling gives Jun a golden watch, a relic from his father. Looking at the oldfashioned watch, Jun wonders if he can become a reliable man.

大學放榜前一天，小春無意間發現了家裡的大祕密。即將成年到異地求學，弟弟夏仔沒放過這最後與姊姊相處的夏天。家鄉的人事物依舊，面對眼前未知的未來，小春既期待又怕受傷害。成年的滋味，竟如此超乎預期地又澀又甜。
從平凡的台灣家庭孕育出後韻無窮的成長故事，勾勒不善表達情感的家人面對分離時那不捨與疼惜之情，藍葦華、鄭有傑演出精采，年輕演員亦不遜色，細膩刻畫女孩面對成年、離家時的不安與期待。