It's mixture of mystery and horror.Its engaging and has a unique concept of time paradox that makes it peculiar from other time travel series.
Mother and daughter are the same person and are result of time travel ,it seems there is not any beginning.Personally I enjoyed the series more than the Dark series that was boring and had illogical time travel occasions.This series can be watched with family,had no sex scenes or nudity.The poignant surroundings make this series more captivating.