Count Fyodor Shumilin intervened in politics out of stupidity, and it cost him too much: he was convicted and sentenced to hard labor. But fate saved Fyodor from certain death and brought him to the island to Ivy. She has a strange name and an even stranger gift, passed down through her family through the female line. She is capable of descending into the Lower World and pacifying the owner of the lake, who exacts blood sacrifices from people. But is it easy to be a bearer of silver blood? And who is Ivy - the mistress or the victim?.. But Fyodor no longer cares: he knows that this girl is his only love.