The Diary of a sentimental killer and Yacare, are two short novels collected in this book. In the first story the assassin infringes the norms of his profession when he's in love. In the second story the investigator for an insurance company following his instincts, and the assassin searching for his victim, is introduced to Anare Indians in Brazil, and centers around the yacares, small crocodiles who are worth their weight in gold.