Han plays the character Oh Yeon-Joo, a cardiothoracic surgeon whose father, Oh Sung-Moo, is a writer. Sung-moo is currently writing his newest one entitled "W", hence the name of the drama.

Yeon-Joo met Kang Cheol (played by Lee Jong-Suk), a fictional character from webtoon, at her office on the day her father went missing. Afterward, she found out that she can teleport from the real world to webtoon, where her father writes.

While on shooting, she posted photos in her Weibo account with the caption, "Underwater filming, which was tough but fun! The scene itself was short, but we spent the whole day filming. Thank you to all of the staff who worked so hard together with me that day~."

According to The Bitbag, the underwater scene was taken for Episode 6.

Han and her co-star Lee were also rumored to be dating.

Crew members reported that the two were holding hands at the set. Han is reported to be in relationship with actor Kang Do-Han, while Lee with Park Sin-Hye.

The drama will have its season finale in Episode 16, as reported by Movie News Guide. The mystery that surrounding identity of the real killer who murdered the family of a congressman will be revealed.

"W: Two Worlds" airs every Wednesday and Thursday on MBC.