Complex sentence: Borrowing heavily from WWI and steampunk action-horror movies, the plot revolves around a sealed away "machine" which came from space that converts people into mutants that do little other than kill and drag new victims to the machine for conversion.
Split into simpler sentences: Borrowing heavily from WWI and steampunk action-horror movies, the plot revolves around a sealed away "machine" which came from space. The "machine" converts people into mutants that do little other than kill and drag new victims to the machine for conversion.