Lu Zheng, an elite special forces soldier, is urgently assigned to Jiangcheng University as the chief instructor for freshman military training. On his first day, beneath the blazing sun on the training field, he unexpectedly finds Su Wannuo, a delicate and frail freshman admired as the campus belle, collapsed from heatstroke. One glance is all it takes for the steely, hard-hearted Lu Zheng to feel a stir in his heart, and he makes an exception to give her special care.
During training, Su Wannuo's frail constitution and soft, gentle nature make her a repeated target of harassment by rich kid Lin Haoyu and covert bullying and ostracism by Bai Rou, the female antagonist. The faculty and students all assume that stern, cold-hearted Lu Zheng will only ever follow the rules. But no one expects him to apply a different standard to Su Wannuo: he punishes others severely for their mistakes, but gently reminds her; while the others train under the blazing sun, he quietly shades her and brings her water; and whenever anyone bullies her, he immediately steps in to protect his wife, publicly face-slapping the provocateurs.