The story is set in the late 1970s and early 1980s, in a small town in Mainland China. A middle-aged couple has three children. The eldest son is obese and mentally challenged, a social outcast and is constantly teased by others. The second child, the daughter, is energetic and independent, and isn't afraid of doing anything to pursue her dreams or to survive. The youngest child is an introverted, quiet boy who is ashamed of his older brother and tries to break away from his family's misery. Breaking into three sections, each focusing on one of the siblings, Peacock allows us to look into the lives of ordinary Chinese people immediately after the Cultural Revolution.

24-year-old OL Chie Ikeshita's (Yuriko Yoshitaka) motto is to try various things to enjoy life. Chie spends her time accordingly to her motto. Chie Ikeshita then starts to date 5 different men and adjusts herself to the different situations. Up to this point, Chie never thought about marriage. She changes her thought after her friend Toshiko Hamaguchi (Anne Watanabe) gets married. Chie takes the advise of Toshiko and decides to marry one of the 5 men. She must now whittle down her choice to one man. Chie says goodbye first to Takumi Tanashi (Kenta Hamano) ..

The story features a team of four sleuthing sisters.

Part One: Legend of the Drum Youthful antiques dealer Jieb is intrigued when she mysteriously receives a decades-old drum. Soon afterward, Jieb is plagued by disturbing dreams and the haunting murmurs of a disembodied female voice. Convinced that the drum is the catalyst for these strange occurrences, Jieb sets out to discover the origin of the instrument - only to be confronted by horrific realizations about herself. Part Two: Black Magic Woman Tired of single life in the big city, Bangkok beauty Pan longs for the happiness of true romance. Her prayers seem answered when she partakes of an exotic elixir called "Black Magic Woman". After just a few small dabs, Pan has no trouble attracting the man of her dreams, but what starts as affection quickly spirals into obsession, and Pan learns the price of becoming truly irresistible. Part Three: Revenge Nop is a hard working police cadet unable to shake the untimely death of an attractive woman named Gunya. While his superiors rule her hanging a suicide, Nop is convinced otherwise and pursues his own investigation. To his surprise, he finds himself guided in his work by a spirit, but not even otherworldly intervention can prepare him for the shocking truth of Gunya's demise.

In his third year of marriage, Jun works at an office and lives with his wife Chie. One day, Jun comes home from work to find Chie collapsed and bleeding in the entryway. He rushes to her aid, but it turns out that Chie was just pretending to be dead. After that, Chie pretends to be dead on a daily basis.

Popular horror webcomic artist Ji Yoon finds life imitating her own work when her publisher turns up dead in a way, precisely mirrors the images in her latest comic. Ji Yoon has an airtight alibi, and almost everyone suspects the death was a suicide or a copycat murder. Everyone except the curious detective Ki Chul lets the case languish as a mystery, but when a series of murders that resembles Ji Yoon’s drawings occur, he finds himself unraveling the terrifying truth of the comics themselves.

Hiroto Miyama works with rookie lawyer Honoka Kono on a team that specializes with criminal cases for Madarame Law Firm. Atsuhiro Sada has become the director of the law firm. One day, the law firm receives a request about a case that took place 15 years ago. The case was about a poisonous wine incident.

Woo Sang is a national swimmer who's always pursuing the number one spot. Won Il is a swimming prodigy who stopped participating in the sport, and now wants to make a comeback. Not only do they become rivals, but they also fall for the same girl, Jung Eun, an aspiring musician who is their childhood friend. The three lifelong friends suddenly find themselves having to juggle love, friendship, and competition, as they undergo the rite of passage of growing up.