La tarea imposible

Every year, young witchlings participate in the Black Moon ceremony, where they are assigned to different houses, and gain full power as witches. Siete Salazar has worked very hard to be selected in the Casa del Jacinto. But nothing goes according to plan... What's more, she doesn't get selected in any house and she happens to be a spare witch! She, along with Valle and Espina, is trapped as a witchling and will lose her magical abilities forever. Seven invokes her only option: the impossible task. If they work together and overcome her, they will gain her full powers. If they fail... Well, the last ones who couldn't complete it ended up turned into toads. Forever.