A dead baby is found in a church. During the autopsy, Dr. Graf finds a feather in his trachea that comes from an exotic bird. Through complicated research, Brandtner and his team come across a criminal ring that steals babies in Italy and sells them for large sums of money in Austria. During the investigation, the young Italian Sandra Fossati comes to Vienna, who searches for her stolen baby on her own and puts her life in danger. Events take a turn for the worse: Brandtner and Rex have to catch the criminals, find the cleverly hidden stolen babies and save the young Italian woman, who is being pursued by the gang.