"The Third One" tells about love, the sweetness that comes with the hardships that every couple has experienced. The film opens with a romantic love story between painter Quang Kha (Han Jae Suk) and doctor Thien Di (Ly Nha Ky). However, just when happiness was budding, an unexpected event struck. A serious, life-threatening traffic accident happened, at the same time the line "love and death always go together" sounded. The story becomes more and more dramatic when Quang Kha wants to go back in time to save his wife. At the same time, a new character takes on an important role, but it is not clear whether good or evil will support him to carry out the above plan.

A mysterious and highly successful hitwoman in Hong Kong is paid to assassinate top-level crime bosses. After beginning a relationship with a noodle vendor, she decides to travel to South Korea to complete one last job. Unfortunately, the dead man's bodyguard is out for revenge.

Si-hyun who lost all memory after a car accident and has colored hearing in which she can see sounds in colors, tries to complete the melody in her dreams. As the song nears completion, Si-hyun's fragmented memories return to her.

Baji (Han Jae-Suk) is tops in his field for organizing underground fights with illegal wagers placed on the fights. The owner of the location for the underground fights is Boss Jang (Song Young-Chang). Baji is now in serious debt and Boss Jang recommends a way for him to climb out of his debt. Baiji lets gambler James (Jung Sung-Hwa) join in on the illegal wagers. James is very sharp and also wields considerable financial power. Baiji then puts together a 9 member team to manipulate the bets. Baiji's girlfriend Seon-Nyeo (Park Seong-Woong) joins the team. The fights progress as planned, but with 2 fights left Boss Jang and James comes to Baiji looking for a piece of the action. The betting has now completely changed. There is only one fight left and the battle of wits begin ...

After being recruited by a race car driver coach, a female taxi driver joins the Speed Angels racing team.

Due to a massive car accident and a twist of fate, passengers on four cars find out the answer to the final multimillion-dollar question in an upcoming episode of The Quiz Show. Everyone rushes to compete, their only challenge is to get to that final question.