Persecoms are humanoid computers that can do almost anything humans can. Virtually everyone in Tokyo has one but Hideki, a displaced country boy going to a college prep school. His life is about to change when he finds a very special one in the trash.
Hideki's lucky find turns out to be a bigger deal than he thought. His neighbor Shinbo sends him to Minoru, a young Persecom specialist, to find out how she's able to move without an operating system. Could she be one of the rumored custom-made Chobits?
Getting into college is Hideki's first priority, but he needs a job to pay the bills. Now he's got a Persecom, but since he can't afford to buy her software, his only option is to teach her everything himself.
Hideki knows so little about Persecoms that he doesn't even realize Chi needs charging. He's already late on his electric bill, and when he tries to plug her in to a power source the whole building loses power!
Persecoms are so amazing: they can work for money just like people. Chi wants to help Hideki pay his bills, so she sets out to find a good job. Her mission gets a little off course, and a whole new side of Chi is exposed.
When Hideki finally finds Chi, she and all the other Persecoms in the city seem to be in a trance. Even Minoru is stumped over the strange behavior. After things cool off, Hideki finds Chi a nice job at Tirol, a nearby bakery.
When it comes to dating, Hideki's clueless. While on a date with his coworker Yumi, he's stumped by her heavy questions concerning Persecoms. Alone at home, Chi gets wrapped up in another book that seems to touch her in a deep, hidden place.
Paranoia takes hold of Hideki when he hears a murder story and is convinced the apartment below his is haunted. Ms. Hibiya, Shinbo, and Minoru join forces to investigate the building and dispel Hideki's fears before he loses too much sleep.
After his boss gives him a DVD player, Hideki gets a video game from Minoru. Overjoyed to know Chi can play games too, Hideki hooks her and Sumomo up to the TV to give it a try, but things never seem to go as expected with Chi.
Hideki takes a week off from work to study for a big test. But when he loses his wallet, growls from his empty stomach ruin all hopes of concentration. Determined to help her master, Chi goes on a mission to cure his hunger pangs.
Anxious to analyze her, Chi's abductor, who goes by Dragonfly on the web, connects her to a room full of his custom models. As he trespasses on forbidden territory, Chi's dark side gets physical to disable his attempts.
Chi is home safe, but Hideki notes something new between them. Minoru continues his relentless search for more information on the mysterious Chobits. Despite Hideki's violent contempt, Dragonfly eagerly - and apologetically - offers his help.
Minoru and Yuzuki continue their diligent search for clues to Chi's origins and reliable information about the legendary Chobits. They recall what they've observed since Hideki brought Chi to Minoru's mansion for any hints.