管大伟（王宁 饰）是一个生长在城中村的小青年，毕业后的他也曾去大城市打拼，但最终他还是选择留在家乡靠收取房租过最平凡的生活。而与他青梅竹马的女朋友唐梓然（施予斐 饰）凭借自己姣好的外形成为了令人羡慕的空姐，因此两人生活轨迹的交集越来越来少......

某个星期天的清晨，管大伟醒来发现自己进入了神奇的时空循环。在这段奇妙的循环中，管大伟得到了巨额财富，彻底过了一把土豪瘾。而在他“潇洒度日”的同时，他的初恋女友唐梓然却陷入了一场突如其来的空难危机。管大伟突然发现，只有进入时空循环的自己能够帮助唐梓然摆脱危机，同时拯救飞机上所有人的生命。是选择“潇洒度日”“继续享乐”，还是牺牲小我，拯救众人。对于即将来临的明天，此时的管大伟该何去何从？

Guan Dawei is a young man who grew up in a village in the city. After graduation, he also went to big cities to work hard, but in the end he chose to stay in his hometown and live the most ordinary life by collecting rent. And his childhood sweetheart girlfriend Tang Ziran has become an enviable flight attendant by virtue of her good looks, so the intersection of their life trajectories is becoming less and less...