About a 27-year-old lawyer with Asperger's syndrome. Due to her high IQ of 164, impressive memory, and creative thought process, the brilliant Woo Young Woo graduated at the top of her class from a prestigious law school.

In 1987, when tear gas exploded like firecrackers, a bloody man jumped into a female college dormitory and a female student treats him thinking he's an activist student fighting for the generation. Based on the handwritten notes of a man who escaped from a political prison camp in North Korea.

An unfathomable incident introduces a genius engineer to dangerous secrets of the world — and to a woman from the future who's come looking for him.

In 1994, on the first day that Yoo Yeul went on air as the new DJ of the popular radio show ‘Music Album,' a college girl Mi-su meets Hyun-woo who happens to drop by the bakery she works at. Like the music streaming from the radio, their frequencies slowly come in sync; even when they're apart, the show brings them together through ebbs and flows of events arising from both pure coincidence and inevitability, until the bitter reality sets in and drives them apart...

Due to various personal reasons, a group of Yun Tae-o’s friends move into his house, where they experience love, friendship, and everything in between.