故事发生在一个圣诞节前夕，疲劳驾驶的中年司机，归途中因走神意外撞死了一个拽着蓝气球的小孩和圣诞装老人。等他苏醒后，发现自己竟附身在刚刚撞死的圣诞装老人，正在兜售的其中一个蓝气球上。待司机发现时光已然倒流，他以灵魂之躯拼尽全力想要阻止这场悲剧的再次发生...…

The story takes place on the eve of Christmas. A middle-aged driver who was tired of driving, on the way back, accidentally killed a child with a blue balloon and an old man with Christmas costume. When he wakes up, he finds himself in possession of one of the blue balloons that is being sold by the old man killed by him. When the driver discovers this, the time has already gone back. He tried his best to prevent the tragedy from happening again with his soul......