The tragic death of a girl who fell from an abandoned building, the disintegration of friendship, and whether Mu Xunfei, who unexpectedly returned fifteen years ago, can let the final truth speak. Keigo Higashino once said, "There are two things in the world that cannot be looked at directly, one is the sun, and the other is the human heart."
Purpose: The most difficult test in the world is actually the human heart