In the dead of night, a body donated for organ transplants mysteriously disintegrates into ashes. Soon after, five recipients, given a heart, corneas, lungs, liver, and kidneys, begin to develop supernatural powers. A teenage girl gains immense strength, a hipster manipulates electromagnetic waves, a novelist summons powerful gusts, a factory manager can heal others, and a woman discovers a strange, still-unidentified ability. Together, they form a reluctant but heroic team known as "HI-FIVE." But they aren't the only ones transformed. A cult leader who received the donor’s pancreas gains the terrifying power to drain life energy and sets his sights on stealing the abilities of HI-FIVE to achieve godlike domination.

On the afternoon of the day before her school trip, Se-mi wakes up from her strange dream and heads to her Ha-eun. It was because she felt like she had to convey the feelings she had been holding back for a long time today. However, unlike her overflowing heart, the two keep falling apart.

Gang leaders Gyeong-cheol and Tae-yong hide after an attack, while psychopath In-seong wreaks havoc. Detective Cha Do-pil, seeking revenge, convinces them to join forces. A pastor, a monk, and a detective unite for a chaotic showdown.

In 1992, Min-young, a member of the university protest music group Wildflower Sound, joins forces with the ideological study circle Flag to support workers at Samhyung Industries, who are striking after going six months without pay. On the day of the strike, riot police launch a violent crackdown. Workers and student musicians alike are beaten and dragged away. In response, fellow students form a resistance line to rescue them. The standoff escalates into a massive clash between citizens and police—broadcast live on national news. Compelled by something greater, Min-young steps onto the stage and cries out: "We are not rioters!" A roar of unified voices rises and echoes across the nation. “Arise, you who live—The day is coming!”

A song like a miracle falls in front of 20-year-old Joseph who has nothing. One day while they were having a happy time singing 'that song' like fate, a man with everything, even the owner of the song, appears in front of Joseph.

One day, during a university festival where people are often known to find a partner, the 3 incredibly single members of the robot club decide to attend. There the sloppy and timid Hwi-so meets a very aggressive girl by the name of Hye-jin. His romantic advances, which he learned through reading books and watching YouTube, finally wake up to make their move. But will two finally become one this fall?