Eighteen years ago, young Conrad Clark met the Doctor and Belinda, and he's never forgotten. As a grown man, Conrad comes across the Doctor and Ruby Sunday as they try to capture a Shreek -- an extra-dimensional predator that marks and stalks its victims. A year later, Conrad finds Ruby and convinces her to appear on his podcast. Sparks fly, and soon they're on the brink of a serious relationship. But when Ruby joins Conrad for a trip back to his home town, she alerts UNIT to the strange phenomena she's started noticing. Are the Shreek coming for Conrad, or are there more terrible forces at work?