Before Thomas was murdered, he planned to start a new life with Karoline.
She lives with her son Jimmy, who has now gained trust in Thomas, on the constant run from her violent ex-husband Joachim, who actually has custody of the boy.
This planned new beginning completely shakes up the family structure of the Becker clan, and an increasingly complex picture emerges for the commissioners. Whether it was Eric's revenge, Marianne's jealousy, Henry's claim or Joachim's tyranny that cost Thomas his life will become clear step by step, because in the end each of them would have a motive.