小美人鱼爱上了人类王子，为了和王子结婚，小美人鱼找到了生活在海底的海女巫。海女巫答应给小美人一双人类的腿，但作为交换，小美人鱼必须交出她的舌头。不仅如此，如果小美人鱼最终没能够和王子结婚的话，那么她将死去变为泡沫。
即便条件是如此的苛刻，小美人鱼还是义无反顾的喝下了药水。当她抵达王宫时震惊的发现，王子即将迎娶一个人类女孩。王子误以为这个人类女孩在海难中救了他的命，可实际上救了王子的是小美人鱼。因为不能说话，所以小美人鱼无法澄清这一误会，就在黎明快要来临时，小美人鱼的姐姐们出现了，她们告诉小美人鱼，想要活下来只有一个方法，那就是杀了王子。

Terenty leaves the collective farm and goes to the city to study to become an agronomist. Marina works hard and looks forward to her husband's return. When her husband returns home, he reproaches his wife for being uneducated, asks for a divorce and leaves for the city. Left with her daughter, Marina devotes herself entirely to her studies and work.