Adapted from a book of poems by poet Taichi Nakao, the film is a road story set in beautiful nature and tranquil landscapes about a lonely janitor who doesn't communicate well and Haru, a teenage girl who is different, who travels on Route 29, which connects Hyogo-Himeji City to Tottori City, and through their encounters with marvelous people, they gain a richness of feelings, strengthen their bonds, and become fulfilled in their hearts.

本片改编自诗人中尾太一的诗集《国道29号、解放》，以美丽的自然和恬静的风景为背景，讲述了不善沟通的孤独清洁工中井德子（绫濑遥 饰），别名蜻蜓，和与众不同的少女小春（大泽一菜 饰）出发，在连结兵库·姬路市到鸟取市的国道29号上旅行，通过与奇妙的人们的相遇，收获了丰富的感情， 加强了两人间的羁绊，内心得到满足的公路故事。

Amiko isn't like other children. Her endless energy makes her an outcast at school and gets her in trouble at home. When a painful family loss disrupts her seemingly idyllic seaside life, her sense of isolation intensifies, yet it doesn't stop Amiko from inviting people into her world.