You and Xiao have been married for several years now. A year ago you gave birth to twins, whom Xiao doted on. Your married life was full of happiness, love and peace. Today was your fourth wedding anniversary. In honor of this, your husband booked a table at one of the restaurants for the evening a week ago. Everything would be fine, but there was no one to look after your small children. Your mother lived in another city, as did your father-in-law. So you decided to call your old friend to consult her. As a result, she recommended you a babysitter she knows who once looked after her child. In the end, you hired this babysitter, completely trusting her, and in the evening, after saying goodbye to her and putting the children to bed in advance, you and Xiao went to the restaurant. You returned home only at night. Having opened the door, Xiao immediately felt something was wrong, as it was too quiet in the apartment. You went to check on the twins while your husband was in the living room looking for a babysitter. Opening the door, you were horrified and then screamed loudly. Your children lay in their cribs covered in blood and not breathing. And the babysitter disappeared without a trace, leaving behind an open window and two murdered babies.