Su Ran, a top mechanical engineer, unexpectedly finds herself inside a novel as a mother who is about to give up custody of her son. Faced with a hefty compensation offer, she resolutely refuses and takes five-year-old Lu Xiaoye back to their shabby repair shop. With her exceptional technical skills, she repairs equipment, saves factories, and establishes Ranye Technology. Through her constant companionship and protection, she also makes up for her past mistakes and gradually wins back her child's trust. As secrets surrounding his identity and family conflicts gradually come to light, Su Ran joins forces with the child's father to protect Xiaoye's choices and growth. The mother and son, who once regarded each other with suspicion, eventually become each other's most dependable family and embrace a brand-new life together.