Sarah and her son, Bibin, live an isolated life. As loud cries of infants haunt Sarah, she scribbles names on her walls. What secret is she keeping?

Merlin's revelations lead Aji Kurian to Sarah's letters. After unravelling Sarah's most twisted secret, Aji finds himself pulled into a dark vortex of truth.

The unravelling of Bibin's cryptic letters begins. Clues lead Aji and his team to Bangalore towards another death. The mystery tightens its grip.

Bibin's puppeteering of human lives takes him to a prominent politician. As Aji digs deeper, he meets with fresh challenges and dreadful questions.