Tokio Baby is a story about 15-year-old Saara whose fate is to be stuck on her parents' farm. She can only dream of an escape from the idyllic countryside to Animecon, a Japanese animation and comics festival, when she gets grounded for three days. Hara-kiri! Saara is saved from dying of boredom by her imaginary friend Aiko, whose totally zenless anarchy makes the rift between Saara and her parents even bigger.

Based on the novel by Väinö Linna, the story takes place during the time of the Finnish Civil War.