Reksio's conflict and eventual friendship with a crow.
Sidenote... I have always struggled hardcore with translating ,kruk' and ,wrona' into english because my first instinct always switches their proper translations around (kruk->raven, wrona->crow). I do suppose it makes some amount of sense- kruk and crow sound more similar than kruk and raven- but it's one of these little things that always caused troubles for me in English.