Shen Zhen-zhong, known as "Mr. Eagle," was originally a biology teacher. In 1992, after witnessing a black kite he had observed for a long time tragically die in a hunter's trap, he resolutely gave up his 10-year teaching career, vowing to dedicate 20 years of his life to write a biography for black kites. In 2012, Shen Zhen-zhong fulfilled his promise and cultivated a younger generation to continue the legacy. Meanwhile, director Liang Chieh-te accompanied him throughout, capturing this moving story of protecting black kites with his camera.