When mathematical formulas become secret love letters and wire fences turn into galactic barriers, the youth of science whiz Shao Haochen and Xu Di quietly blossoms among test banks and the stars.
Separated by a fence dividing the elite high school from the rest, he uses the Lorentz force formula as a code every Wednesday, and she replies with little pig doodles hidden in the corners of her rough-work notebook.
The ribs of the umbrella they share in the pouring rain trace out a heart-shaped function, while star trails in Klein blue, etched on the white walls of the lab building, become encrypted signals in this "unconventional young romance."
From ginger tea on Christmas Eve in eighth grade to a confession outside the fence in eleventh grade, they spend five years solving a multivariable equation called "liking someone." The cutoff score for the advanced class, the head teacher's inspections, and the names forever separated by three inches on the honor roll matter less than the bandage hidden in the boy's sleeve and the starlight glimmering on the girl's little canine teeth.
As Ursa Minor enters a once-in-twenty-years period of heightened activity, can the hardest equation of their youth find its perfect solution beneath the stars?
