(2018), or Wanbyeokhan Tain , is a South Korean comedy-drama that masterfully dissects the fragile boundaries of modern relationships in the age of the smartphone. Directed by Lee Jae-kyoo , this film is an adaptation of the 2016 Italian hit Perfect Strangers ( Perfetti Sconosciuti ), a premise so resonant that it has been remade in dozens of countries.

( Yoon Kyung-ho ), a recently divorced teacher who arrives alone, despite claiming to have a new partner.

As the wine flows, Ye-jin suggests a provocative game: everyone must place their smartphones on the table. For the rest of the night, every incoming text, email, and phone call must be shared with the entire group—messages read aloud and calls put on speaker.

The film centers on a housewarming dinner hosted by Seok-ho (), a plastic surgeon, and his psychiatrist wife Ye-jin ( Kim Ji-soo ). They invite their lifelong childhood friends and their respective spouses:

( Yoo Hae-jin ), a rigid lawyer, and his wife Soo-hyun ( Yum Jung-ah ).