Despite their different family backgrounds, four friends grew up together in the wearisome years of the 70s. But as time goes by, each of them takes a different life path.

Writers that lived under Japanese rule in the 1930's are reincarnated into a bestselling writer who is in a slump, a mysterious ghostwriter and an anti-fan of the bestselling writer.

Nam Shin is a son from a family who runs a large company. After an unexpected accident, he falls into a coma. His mother Oh Ro-Ra is an authority on brain science and artificial intelligence. She creates an android named Nam Shin III which looks like just like her son Nam Shin. The android pretends to be Nam Shin and he has a bodyguard So-Bong.

An unappreciated old granny magically turns 20 years old again and decides to make the most of her newfound youth.

Based on a Japanese manga, Kanna-San, Daiseikou Desu, this story revolves around Kang Han-na, an overweight phone sex employee and secret vocalist for Ammy, a famous Korean pop singer who actually lip syncs as she cannot sing. After getting humilitated publicly by an ungrateful Ammy, Han-na undergoes an extreme makeover to become a pop sensation herself.

In disguise as her friend, Ha-ri shows up to a blind date to scare him away. But plans go awry when he turns out to be her CEO — and makes a proposal.