Ju-a, a 15-year-old girl born and raised in Chuncheon, a small tourist town in Gangwon Province, spends her summer vacation swimming with her friends during the day and helping her mother, who runs an old restaurant, at night. Then, one day, a massive typhoon hits her hometown, and the statue, the town's landmark, disappears.

A mysterious virus spreads out. Anyone infected feels the emotion of love, and the emotion amplifies until it kills the person in love. The pessimist Taek-seon, who likes nothing in life, is infected, and the researcher Gyun reaches her out to test her the medicine that he's developing. Soon Gyun finds out Taek-seon has special antibody, but Taek-seon slowly feels love to Gyun. Is this a real love or just a virus?

In a world where an AI programme allows people to communicate with their deceased loved ones, a flight attendant and a mother question the meaning of reality and humanity.

Seon-hee is a high school girl who used to tell lies to get her friends attention. She leaves Seoul guilt-ridden when her friend Jung-mi kills herself because of Seon-hee's lies. In the countryside where no one knows her, Seon-hee begins a new life as Seul-ki.

Eun-seo struggles repeatedly to find her own place. Her father Jin-cheol lives alone in a house where his family has left. Eun-seo unexpectedly returns her childhood home to live with her father. There, she faces traces of her family she had forgotten.

Min-jae, a rookie police officer with a natural born talent for driving, is assigned to the perfect team: the Hit-and-Run Squad. But at the same time, for police detective Si-yeon, it is a place she is unjustly demoted to for doing her job. The two team up to arrest the rich and powerful speed maniac Jae-chul who is suspected of committing crimes for his obsession for speed.

For 15 days, a politician and his wife navigate a scandal after their daughter goes missing on the eve of the national elections.