Pippa and Thomas move into their dream apartment. They notice that their windows look directly into the apartment opposite - inviting them to witness the volatile relationship of the attractive couple across the street. But when they attempt to anonymously intercede in their lives, they unwittingly set in motion a chain of events leading to deadly consequences.
From the outer reaches of space to the small-town streets of suburbia, the hunt comes home. Now, the universe’s most lethal hunters are stronger, smarter and deadlier than ever before, having genetically upgraded themselves with DNA from other species. When a young boy accidentally triggers their return to Earth, only a ragtag crew of ex-soldiers and a disgruntled science teacher can prevent the end of the human race.