A massive sinkhole mysteriously opens up in Los Angeles, separating part of a family in an unexplainable primeval world, alongside a desperate group of strangers.A massive sinkhole mysteriously opens up in Los Angeles, separating part of a family in an unexplainable primeval world, alongside a desperate group of strangers.A massive sinkhole mysteriously opens up in Los Angeles, separating part of a family in an unexplainable primeval world, alongside a desperate group of strangers.