基于自传主题。 马克是一个小男孩，他把自己的空闲时间花在公共汽车上，绕着他的路线行驶。 司机轮班一直在变化，乘客一直在离去，夜色即将到来，但马克永远不会出去。

Based on autobiographical motifs. Mark is a young boy who spends his free time on the bus, circling his route. Other passengers are not helping him in solving the seemingly impossible riddle that his favorite bus driver has given him. The driver shifts are changing, the passengers are leaving and evening is coming, but Mark never goes out.