Believing in the existence of mermaids, a 7-year-old girl drifts into her secret fantasy world as she observes her mother pine with wasted love.

Lana, a 13-year-old outcast firework seller, clings to her only companion—her adopted dog—who seems indifferent to their conservative village. But when she uncovers a quiet, insidious destruction creeping into her home, she realizes the true nature of those around her and must decide whether to fight back or let it consume her.