Lu Chengan discovers that behind his wife's hour-long solitude each time lies a special scientific research plan. With the careful reminder of his friend Gu Yanchuan and the professional help of Captain Han, he follows a cartoon sticker to find the answer, and successfully brings back his son An'an. Having gone through this growth, the father and son move into a sunny and bright new home, better understanding the preciousness of honesty, companionship, and guardianship. The deep friendship left behind by Gu Yanchuan transforms into forward-moving strength, encouraging them to cherish life, abide by rules, believe in justice, and join hands with courage and kindness to open a warm and happy new chapter.