陈应舟应孙德海跪请为好饿外卖研发算法，与骑手结友。孙一航逼他离开、压榨骑手。台风天，孙一航逼陈应舟送单，驾车撞伤他并扔入下水道。此时陈应舟离算法成功仅一步，孙一航接孙德海电话，惊觉其关键价值。。A story of two girls who travel through time and change places from 1922 to 2022.。
