A community of brilliant scientists known as the Jensen Project team up with two former Project members and their genius teenage son to prevent dangerous technology from falling into the wrong hands.

When the moonless shadows of London give birth to a new nightmare, John Luther (Idris Elba) once again confronts the depths of human depravity. As a series of monstrous killings becomes more audacious, Luther and new recruit DS Catherine Halliday (Wunmi Mosaku) are confounded by a tangle of misdirection that seems to protect an unspeakable horror. But as the case brings him closer than ever to the nature of true evil, a reluctant Luther faces the...