影片描述一位出版社编辑在火车上遇见一名精神科医师，两人各自分享离奇经历，故事尚未说完，医生却消失无踪，一则比一则怪诞的故事开始展开。Separated in three apparently independent chapters, Advantages of Travelling by Train tells the story of editor Helga Pato, a forty-something woman who by chance meets psychiatrist Ángel Sanagustín in a train ride, who tells her (first chapter) the story about one of his patients, Martín Urales, who enlisted in the army was sent to fight in the Kosovo War where he met Dr. Linares, a determined and compassionate woman that trying to create a child hospital to heal war damaged is forced to make a terrific deal: in exchange to have the hospital she wants, Linares must bring a child per month to her benefactors to film adult and snuff movies. Returning home after he was fired from army to attempt alert his superiors, Martín's aging father rejects the story and rejects his son, forcing Martín to the exile. In this point Sanagustín downs in a train station to buy candies but have no time to return, and Helga finds Sanagustín's folder in front of him. Reading the medical record of the ...