Complex sentence: On their last weekend together, Megan and Abby Graves become lost in a remote part of the Arizona desert where they are lured to Skull City, an abandoned mine town; however, Skull City is anything but abandoned--and there's no way out.
Split into simpler sentences: On their last weekend together, Megan and Abby Graves become lost in a remote part of the Arizona desert where they are lured to Skull City, an abandoned mine town. However, Skull City is anything but abandoned--and there's no way out.