Ye Niannian goes to the kindergarten to pick up her niece, but mistakenly brings the richest man in the city's son back home. Three days later, this little toddler who hadn't spoken for eight months says his first word to her: "Auntie." The babysitter turns into a "temporary guardian" with an annual salary of five million. She finds injuries on the child, secretly installs a monitor, and captures footage of the fiancée sneaking into the room late at night. When the secret is exposed and the wealthy family marriage collapses, she becomes the only person the child trusts. Can a wrongly picked-up child change the destiny of two people?