Eighteen-year-old Xiao Chi has a visual impairment, but his mother is always worried about his relationships and arranges for him to share an apartment in Jiangcheng with an old acquaintance, Xiaoyuer. Eager to set off on a trip to Sanya with his father, his mother drops Xiao Chi off at the high-speed railway station early to entrust him to Xiaoyuer. The sudden co-living arrangement makes Xiao Chi quite awkward. Facing Xiaoyuer, whom he hasn't seen in a long time, the two young people will live closely together under the same roof, and a relaxed and warm urban youth story begins.