An Army private fails to expose abuses he suffered from his senior. When every member of his platoon gets passes, the senior starts searching for the culprit who tried to report him.

Wan-ju, a failed stage actor, makes ends meet by playing real-life parts as someone’s boyfriend or wingman. Desperate for money, Wan-ju takes on his most challenging role ever when he agrees to pretend to have witnessed a murder.

Kyung-min lives alone in a one-room apartment. One day, she finds traces of a stranger breaking into her room and soon a mysterious murder case begins to unravel.

One day, three siblings receive a postcard from their mother who left them a long time ago. But all it says is "I miss you." Three siblings are disconcerted by the sudden contact, but eventually, they go on a trip to meet their mother.

YeonKyeong, a 33-year-old woman decides to give up on her music after failing multiple auditions. She has been pursuing her dream of becoming a singer from the day she performed in a radio competition but she can’t go on anymore. One day, YeonKyeong receives a letter and a guitar from Hyunsoo, her high school friend she used to make music with. Perplexed by his letter, she embarks on a journey to Wolmi Island to say goodbye to her old dream.

"I just got dumped. Will you have breakfast with me?" At a breakfast club, heartbroken Sa-gang and Ji-hoon stumble upon mysterious "breakup souvenirs." Each item holds a secret pain, reflecting their own. Will they find the souvenir's owner?