Nightsiren (Slovak: Svetlonoc, Czech: Světlonoc) is a 2022 Slovak-Czech feminist psychological horror drama by director Tereza Nvotová.

Many years later, in current day, Šarlota, now a young adult, returns to the village, summoned by a letter from the mayor, requesting her to claim her mother's inheritance.

Because she ran away as a child and was never found, she's met with distrust and superstition: She and her sister had been claimed to have been taken by an accused witch, Otyla, a neighbour of their childhood home.

Šarlota confides in Mira that she had a miscarriage, and believes herself to be at fault for the fetus's death, as she doesn't want any children and that lack of love must have killed the unborn child.

Šarlota and a local shepherd, Rado, are the first to start dancing, after they consume drinks prepared by Mira with her own herb mixture.

In the nearby woods, Šarlota experiences a drug trip, presumably caused by Mira's herbs, and witnesses witch-like persons perform dances and orgies.

Šarlota, a trained nurse, and Mira try to help the dying Helena, but Anna screams at them to get off and not touch her and yells for blessed salt.

They're demanded to reveal where they took the children, and eventually, Tomáš and more locals go outside to search while Anna interrogates Šarlota and Mira.

In the last scene, at an undefined time, Mira and Šarlota are happily running through unknown woods, undress, jump into a lake and swim with no other company.