When one of RICK'S experiments on knowledge-absorption-via-osmosis goes horribly awry (and when don't they), Rick and MORTY find themselves sucked into an ancient, dusty tome full of fairy tales. And not the sanitized version - we're talking old-school, Grimm-dark fairy tales. On their arrival in this strange new universe, the two are separated, and if they don't take everything they know about fairy tales and subvert those very same expectations, they're going to breathe their very last, weird breaths.