A rather small dragon lives in a rather large castle. The wondrous magic empowering Dwago's clockwork life also charges him with a solemn duty. His mistress needs him. For this child born with a fragile heart, he will brighten her invalid days and protect her darkest nights. When Dwago's master can no longer keep his young daughter safe, Dwago must fulfill his duty and confront his fears before her life ticks away. But he is only a very small dragon.