Oscar and Teo (13 and 11 years old) are two brothers, very different from each other, who will have to face the loss of their mother, a scientist obsessed with wormholes.

Three friends film a documentary about Joanna Toy, a woman convicted of witchcraft 400 years ago in the town of Terrassa, Spain. In 1619, six women were accused of witchcraft. Five were hanged after being tortured, but Joanna Toy escaped.