《Tko pjeva zlo ne misli》（1970 年）的续集，故事背景设定在 1964 年。

一群研究生在历史博物馆偶然发现了一本写于1919年的日记，日记作者在里面坦白自己曾犯下五桩谋杀案。没想到，这些记录竟成了近期一系列案件侦破的关键线索。

Sasha Zaytseva, a sweet girl who dreams of losing weight and meeting true love. She is a promising surgeon, leaves plastic surgery after she learns about the betrayal of her fiance. Having moved to her parents, she begins to work in the clinic of her father, where she meets her first school love - Maksim Mayorov.

Sasha finally has what she dreamed about: a serious relationship with Maks Mayorov and loss of many extra pounds with such difficulty. And here it is, when, it would seem, the very thing “they lived happily ever after“ should have come, Dr. Zaytseva is faced with new obstacles. Will Zaytseva be able to overcome them, or will they become insurmountable for her?

距离上一部关于波琳娜·P的电影已过去一段时间，如今我们的小主人公已十一岁！尽管大人们总跟她说这是“她人生中最美好的时光”，但对波琳娜而言，事实并非如此。五年级时，她得面对严格又固执的地理老师米尔科维奇教授，还有来自5D班的玛尔塔——波琳娜遇到的首个霸凌者。似乎这些还不够，她很快又发现亲爱的祖母莉耶尔卡患上了一种罕见且无法治愈的疾病。波琳娜将再次凭借她最强大的武器——个人魅力和丰富的想象力，去应对生活中的麻烦，同时她也将领悟到宝贵的一课：生活不只是为了赢。