Three-year-old Xingxing, an adorable little girl, stands alone at the entrance of a residential compound, saying she wants to find her father. No one could have imagined what would happen when this little sweetheart, who can barely speak clearly, arrives. Her father may act stern, but he secretly brings home a whole room full of brand-new toys. The second uncle's first question after work is always, "Where's Xingxing?" Even the housekeeper grandpa carefully saves the wildflowers she casually picks. Xingxing also keeps talking about a little friend living inside her head, who helps the family avoid one little mishap after another. Just as everyone grows accustomed to the unexpected liveliness she brings, the tender secret hidden behind Xingxing slowly begins to come to light.