Young girl Nuan Nuan relies on her mobility-impaired mother for mutual support, living in financial hardship. The sensible Nuan Nuan collects empty bottles to subsidize household expenses, and a street-side restaurant owner warmly and frequently helps the mother and daughter duo. By a chance accident, she unexpectedly meets the male lead. Having witnessed the difficult plight of the mother and daughter with his own eyes, the male lead chooses not to step forward and startle them, but instead silently provides help behind the scenes and arranges rehabilitation treatment. The sudden kindness fills the mother and daughter, who have tasted the hardships of life, with wariness and deeply hidden knots in their hearts. The male lead always maintains restraint and gentleness, slowly melting away their psychological defenses with long-term silent protection.