Grandpa had a mysterious little box and Niuniu always wanted to find out what was inside when there was no one else around. One day, seeing Grandpa go out and driven by his curiosity, Niuniu took out a hammer and broke the lock. Just as he was about to lift the lid, Grandpa's footsteps got louder and louder. Dropping the little box as fast as he could, Niuniu ran away in panic.... Noticing something amiss, Grandpa confronted Niuniu. The boy, however, kept weaving lies to cover his tracks—one after another—until his story crumbled under its own contradictions... With the impressive dialogues and the unique visual design, this book tells an easy-to-read and thought-provoking story to explore the relationship between lies and truths.