Perfect Number


Korea, Crime & Mystery

Perfect Number


A high school math teacher leads a dull life, going from his job to a café to see the woman he admires from afar and then home to his apartment.

Kim Suk Go (Ryoo Beung Bum) is brilliant in math but awkward in all other aspects of his life. The woman he secretly likes, Baek Hwa Sun (Lee Yo Won), also happens to live next door to his apartment with her niece, Yoon Ah (Kim Bo Ra).

But one day, Hwa Sun’s violent ex-husband tracks her down at the apartment and attacks her and Yoon Ah. Suk Go quietly listens to the scuffle going on next door and then finally decides to walk over and knock on the door.

When Suk Go learns that Hwa Sun has killed her ex-husband during the fracas, he decides to help her devise the perfect alibi for the crime. Although Hwa Sun is cleared of the crime thanks to Suk Go, something just doesn’t sit right with Detective Jo Min Bum (Jo Jin Woong).

When Min Bum realizes that Suk Go, a high school classmate, is the next-door neighbor, he decides to investigate Suk Go also.

What strange secrets will Min Bum uncover about the reclusive Suk Go?

“Perfect Number” is 2012 South Korean film directed by Bang Eun Jin. It is adapted from the 2005 novel The Devotion of Suspect X by Keigo Higashino.

Original title
Romanized title
Yonguija X
Also known as
Suspect X
Volunteer Team
Suspects X
Broadcast Network
Broadcast Period
Korea Crime & Mystery


Restricted Access

Sorry, this content is not licensed for your region.
Click here to learn more

  1. Perfect Number

    Perfect Number

    EN 99% Korea


Ryoo Seung Bum
Main Cast
Lee Yo Won
Main Cast
Jo Jin Woong
Main Cast
Im Sung Min
Supporting Cast

Subtitling Team  

Meet the community members dedicated to bringing you the subtitles for this channel. Please encourage them by leaving a comment below!

5 languages
5 languages
Subtitles on Viki are licensed under Creative Commons BY-NC-ND 3.0

English, Spanish, French, Italian and 1 more languages

You can subtitle on Viki and be part of the community too!

Learn more

Fetching results...