The strange and inexplicable blue blood has aliens with no home. The intelligent creature from Saturn, the danger of the destruction of the earth people. This book contains two stories, "The Blue Blood Man" and "Return to the Tragedy", and it is also the first book in the "Legend of Wesley" series where aliens appear. The scientist Fang Tian, who looks like ordinary people, is actually from an alien planet. In addition to the blue blood flowing on his body, he also possesses extremely strong brain waves that can hypnotize others. His situation in the book is considered to be the author's own situation, expressing his emotions through the scenery.