Khoon Bhari Holi - S1.E509

A weeping six-year-old girl is found on the street, lost and confused. When asked about her parents, she seems confused and shows a piece of paper with "CID inspector Daya” written on it." When taken to the CID bureau she sees Daya and doesn't let go off him, Daya however seems confused and doesn't recognize this child. Who is she? How does she know Daya?