The lights in the lake

A magnificent English detective in the surroundings of a mysterious and sinister boarding school. The story of twin sisters who will have to figure out the secrets and riddles of their educational institution.
Since the silent and shy rose got into our school, my sister and I have been tormented by the question, who she is? What secret does this girl hide without the past, preserving only a golden pendant from her former life and ... the ability to handle horses. And so we had the opportunity to solve this riddle - we went to the hotel by the lake with the whole school! But it turned out that more than one rose keeps secrets. The dark waters of the lake are also full of secrets. Someone comes out of it at night and wanders around the hotel, leaving wet traces on the floor and frightening guests. And in the evenings, if you look closely, lights are visible in the depths of the lake.
For secondary school age