When the Sun begins to expand in such a way that it will inevitably engulf and destroy the Earth in a hundred years, united mankind finds a way to avoid extinction by propelling the planet out of the Solar System using gigantic engines, moving it to a new home located four light years away, an epic journey that will last thousands of years.
The story of 65-year-old retired bridge engineer Zhang Qianying and a troubled teenager Chen Zhiyong. A series of warm healing and heart-piercing incidents happen, bringing the two lonely people closer to each other.
Ping An is an autistic teenager who gains recognition for being a badminton prodigy. Zihao is his younger brother and a fellow badminton player. Xiao Na is a bright and cheery young woman who helps out at her grandpa's badminton court for the summer. She gets close to both brothers and becomes attracted to Zihao. However, their journey is not as smooth-sailing as they'd hope and the two brothers are pushed to a difficult crossroad.
