The Hit List

Pinky seeks help from Manav and asks him to save her life. When Manav arrives at Neena's house, Neena informs Manav that Adi is after her life. Manav and Adi convince Neena that Adi will not kill her. Then, Neena shows them a letter which claims that Adi wants to kill her. Who has sent Neena this letter?