Complex sentence: Soon they find themselves locked in battle with a horde of rampaging, unstoppable hybrids... and time is running out before Miranda will inevitably surrender to the killer instinct that lurks inside her own body.
Split into simpler sentences: Soon they find themselves locked in battle with a horde of rampaging, unstoppable hybrids. Time is running out before Miranda will inevitably surrender to the killer instinct that lurks inside her own body.