Top racing engineer Ye Zhimeng is laid off, and brings her sick daughter back to a small town to work as a cleaner. In the warehouse, she discovers the legendary racing car MR-07 designed ten years ago, and makes a bet with boss Lin Wenzhou to fix it in three days. She uses the auscultation method to find the fault, exposes someone pouring abrasive to sabotage it, and is blackmailed by the mastermind Zhou Hao using his daughter's surgery. Zhou Hao turns himself in, she takes over the club, and leads the team to a runner-up comeback in the endurance race. Lin Wenzhou confesses the truth about the layoff and confesses his love. Three years later, the racing team wins the championship, he proposes, and she is no longer alone.