Tatort S2018E33 - Batic - 80 - Wir kriegen euch alle

The parents of a little girl are murdered in a particularly brutal manner in a Munich villa. Little Lena survived the massacre. She was drugged. Batic and Leitmayr find her sleeping in her floating tent in the garden. Chinese au pair girl Chi Ling danced the night away. She tells the inspectors that before the murder, Lena spoke of a Santa Claus who would come the next night. And indeed, a surveillance camera shows Santa Claus in the garden at night. But how did the man get into the house? Did Lena open the door for him? And what role does Lena's smart doll Senta play in this?