这部作品讲述了一个家庭及其纽带的故事，当一男一女在伊诺登的某个车站相遇，被封印的“神秘齿轮”开始移动。 在一家小造船厂工作的永井武在车站与女大学生铃木千叶交谈，她看到他时非常沮丧。 千里奈美拒绝让他见他的父母，即使他们最终成为恋人，竹茹得知原因后感到震惊。 而两人将从他们难忘的过去迈出新的一步。

The "wheels of mystery" begin to move when a man working at a small shipyard meets a female student who seems to get upset at the sight of him. While they eventually get closer and end up dating, they need to take a step forward as their pasts come in between.