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The great detective Little Sapling has just returned home. In disbelief, she rubs her eyes, opening and closing them, then opening them again. Her house has been buried?!
A gigantic, translucent envelope, as big as a mountain? A translucent envelope?!
Staring at the envelope that has buried her house, Little Sapling is cautious, doing her best not to touch it.
But her reckless companion grabs the letter in her mouth. A flash of white light suddenly shines before them, making them shut their eyes involuntarily.
When they open them again, they find themselves in a place called Sea Forest.
For some unknown reason, Sea Forest is disappearing. They can't go home unless they solve the problem, so for her own sake and Sea Forest's, Little Sapling begins her investigation.
Theme: Strengthening parent-child relationships
