Mary, a 10-year-old girl, came from a good family since she was a child. However, her parents were busy with work and entertainment and neglected to care for their children. As a result, Mary was withdrawn and stubborn, had a bad temper and was petty. In a sudden disaster, Mary became an orphan and was fostered in her gloomy and eccentric uncle's house. Her uncle's house was an old large manor, and Mary was usually only accompanied by a maid. Mary often had nothing to do and soon became bored. Sometimes she would hear strange crying sounds in the middle of the night. Mary began to explore the manor secretly, and found a strange boy who was sick in bed and had a bad temper than herself. By chance, Mary accidentally found an abandoned secret garden in the manor. Led by a little robin, Mary found the key to the garden, and she determined to save the garden by herself. At the same time, the two children also discovered the secret to growing up happily, and their destiny has undergone incredible changes...
