CHto, esli personazhi folklora na samom dele zhivut sredi nas, hodyat na rabotu, postoyanno s nami vzaimodeystvuyut, a nam i nevdomyok? Kak byt, esli okazhetsya, chto tvoy blizkiy - sovsem ne toy zhe prirody, chto i ty? Mozhno li sdelat ego chelovekom?
V tsentre syuzheta - yunaya rusalka Asso, kotoraya, kak i prochie magicheskie sozdaniya, dolzhna provesti god sredi lyudey, a zatem libo vernutsya k svoim, libo ostatsya sredi nas navsegda. Pered ney otkryvaetsya udivitelnyy novyy mir, polnyy vozmozhnostey i opasnostey. Geroine pridyotsya ochen bystro vzroslet, ved ona okazyvaetsya v tsentre srazu neskolkih detektivnyh syuzhetov, prichyom v raznyh rolyah, a novye znakomye, kak kazhetsya, hotya i yavlyayutsya lyudmi, no znayut o samih sebe eschyo menshe neyö