When a scientific experiment opens a portal to the unknown, monstrous creatures emerge, tearing through cities and pushing humanity to the brink of extinction. Jack Haley, a former environmental operative, thought he had walked away from a past that nearly cost him everything. But as cities fall and hope fades, the very work that once nearly tore his life apart is calling him back.  Teaming up with Delta Force soldier Laura Ramirez, Jack embarks on a desperate mission to stop the invasion. But not everyone wants the monsters gone-powerful forces seek to exploit the chaos for their own gain. With time running out and enemies closing in, Jack and Ramirez must uncover the truth before it's too late. Drifters is a pulse-pounding science fiction adventure for fans of Pacific Rim and World War Z.