有时候，这个世界大到我们一辈子都无缘相见；有时候，它又小到一抬头就看见了你的笑脸。所以，遇见时请务必心怀感激，相爱时请一定用心珍惜，转身时请保持优雅，挥别时请带着微笑。

On a quest to find the father she thought was dead, a determined young girl uses a mysterious device that allows travel between worlds but unknowingly unleashes a monster from one of those worlds that haunts her every step.