In the center of the story is the story of a young girl from the Dai nation, who, despite gossip and accusations of witchcraft, becomes a successful doctor and finds happiness in her personal life.

梁璎（黄音 饰）、黄柳花（汪漪 饰）和袁璞君（二林 饰）一起离开潮汕高级商船技术学校到上海实习，一行人前往黄浦江边去看轮船，哪知道遇到了有人落水。虽然梁璎自己也不会游泳，但她还是义无反顾的跳进了江水里救人，所幸得到了“人民91号”船的水手长马骏（中叔皇 饰）的出手相救，梁璎和落水的人才捡回了性命。
马骏强烈谴责梁璎不顾后果下水救人的行为，这让梁璎感到非常的委屈。然而，让她没有想到的是，自己所实习的船只，就是人民91号，在船上，她和马骏再度相逢了。赵船长（张翼 饰）对女孩学习开船存在着偏见，因此总是安排梁璎等人去干一些无关紧要的活计，这让梁璎感到十分不满。

A soldier finds his new role in the transition from war time to the construction era.

Twelve-year-old Hai Wa sends a secret letter containing Japanese military information to the Eight Route Army during the anti-Japanese war.