Marty and Doc are at it again as the time-traveling duo head to 2015 to nip some McFly family woes in the bud. But things go awry thanks to bully Biff Tannen and a pesky sports almanac. In a last-ditch attempt to set things straight, Marty finds himself bound for 1955 and face to face with his teenage parents -- again.
Rachel Keller is a journalist investigating a videotape that may have killed four teenagers. There is an urban legend about this tape: the viewer will die seven days after watching it. Rachel tracks down the video... and watches it. Now she has just seven days to unravel the mystery of the Ring so she can save herself and her son.
In early-1970s Las Vegas, Sam "Ace" Rothstein gets tapped by his bosses to head the Tangiers Casino. At first, he's a great success in the job, but over the years, problems with his loose-cannon enforcer Nicky Santoro, his ex-hustler wife Ginger, her con-artist ex Lester Diamond and a handful of corrupt politicians put Sam in ever-increasing danger.
