Forest soul Mavka faces an impossible choice between her heart and her duty as guardian to the Heart of the Forest, when she falls in love with the talented young human musician Lukas.

Mavka, a water nymph, loves Lukash, a country youth. Their brief happiness ends when Lukash is forced to marry the shrewish Kilina. The Spirit of the Forest turns Lukash into a wolf as punishment for his infidelity. The strength of Mavka's love breaks the spell, but Kilina curses the nymph, transforming her into a weeping willow. This beautiful and tragic story is based on a play written in 1912 by Lesya Ukrainka, a Ukrainian poet, writer and political, civil and female activist, and includes mythological characters taken from Ukrainian folklore.