Nandini written update, July 4, 2018: The truth about Gayathri is revealed

In the latest episode of Nandini, Gayathri (in disguise of Sandhiya) requests Naganandiyan to not help Arun, Ganga, Madhavi and other palace inmates in eliminating Nandini. But, he refuses to accept the request put forth by Gayathri. Hence, Gayathri challenges Naganandiyan to try and eliminate Nandini.
Arun asks Gayathri, the reason for siding with Nandini. Gayathri tells, she was acting as if she was on their side to know more about their plans which they device against Nandini.
Madhavi drags Gayathri to the hall and presents the real facts about Gayathri to Moorthy and his parents.Madhavi tells, Gayathri was in the disguise of Sandhiya from Malaysia, but she is actually Muniappa’s daughter.
Moorthy asks Gayathri why she did like this to him and slaps her. Ganga suggests evicting Gayathri from the palace. But, in order to prevent the revelation of secret arrangements done to kill Nandini, Gayathri is locked in a room in the palace by Madhavi.
Gayathri passes the information to Nandini and Muniappa about the arrangements done in the palace to kill Nandini. Muniappa assures to Gayathri that, he will take extra care of Nandini.
Nandini visits the palace to see Naganandiyan to know the link between him and the unknown evil power. Moreover, Nandini wants to meet Gayathri too.
When Nandini goes in search of Gayathri, suddenly Ganga wakes up and following her, Arun too wakes up at night. Moorthy apologises to Ganga for misunderstanding her whenever she explained the truth about Sandhiya (originally Gayathri).
Meanwhile, Nandini reaches Naganandiyan's room.