"There Is No Secret") is a 2016 South Korean mystery thriller film directed by Lee Kyoung-mi, her second directorial outing after 2008's Crush and Blush, and co-written by Park Chan-wook.

She is beautiful, is married to a charismatic young politician (Kim Joo-hyuk), and her adolescent daughter who used to be a troublesome child is now doing better at school.

Then Yeon-hong learns from the school her daughter attends that she had an eccentric friend named Choi Mi-ok (Kim So-hee) and they were both bullied by their classmates.

While questioning Mi-ok, Yeon-hong notices the girl is wearing an expensive watch that looks like her daughter's despite coming from a poor family.

Yeon-hong then hacks into her daughter's email account and finds leaked examination papers sent by a young female teacher at her school.

The teacher eventually admits she leaked the papers but only to help Min-jin and Mi-ok improve their grades so that they can become popular to avoid getting bullied.

A traumatized Yeon-hong blames her husband for their daughter's murder to get the city's sympathy vote since he refuses to tell the detectives where he and his driver were during the night Min-jin went missing.

Yeon-hong takes the phone and is shown hatching a plan to kill the person who sent the contract killer to murder her daughter.

Later that night, while her husband is celebrating his victory, Yeon-hong calls up the person who hired the contract killer and forces them to come to the scene of the crime or else she will leak the sex video onto the net.