Fantastychna istoriya, scho perechoplyuye podych! Svit spovnenyy dyvovyzhnych rechey ta nezbahnennych mozhlyvostey... I ye lyudy, yaki shukayut′ shlyachy do yoho vysot, do neozoroho kosmosu. Povitryanoyu kuleyu Kler Dyulak vyrushaye do stratosfery na poshuky zahadkovoho dzherela enerhiyi, efiru, ta znykaye. Henial′nyy inzhener Archybal′d Dyulak vpevnenyy, scho vtratyv druzhynu nazavzhdy, ale yichniy syn, na imya Serafin use sche spodivayet′sya na yiyi povernennya. Rik potomu vony otrymuyut′ zahadkovyy lyst vid neznayomtsya, u yakomu ydet′sya, scho Kler vela sudnovyy zhurnal. Rodynu prosyat′ pryyichaty do bavars′koho zamku, de na nych chekatyme ambitnyy molodyy korol′, yakyy mriye zdiysnyty polit na korabli, zaryadzhenomu efirom. Prote v zamku na nych chatuyut′ nebezpeky, adzhe ye lyudy, yaki ni pered chym ne zupynyat′sya, aby zavoyuvaty kosmos.