Iron Man 3 opens with a flashback to 1999, narrated by Tony Stark. It’s the eve of the new millennium, and Tony is partying with an attractive scientist who is interested in DNA modification as it relates to regeneration. They have an elevator encounter with an enthusiastic scientist interested in recruiting Tony (and the woman) to his new company. We’re told via Tony’s voice over that this is where it all started.
We then jump to modern day Tony Stark, struggling to deal with recent events. Christmas is approaching, and Tony has been spending all of his time in the lab, hardly ever sleeping, working on perfecting a new suit of Iron Man armor that will fly to his body in pieces at just a thought. He’s currently living with Pepper Potts, who is still running his company. Tony hasn’t been sleeping because he’s still haunted by his near-suicide in the wormhole in New York during the events of The Avengers.

The Croods live in a cave. That should be too surprising, considering that they are cave people. But beyond just living in the cave, they define their entire lives by it. The last surviving family of Neanderthals in the valley, the Croods spend almost all of their time in the cave, emerging only to hunt for food. The cave has kept them safe, as have the rules implemented by Grug (Nicolas Cage), the father of the family. Inside the cave live Grug and his wife, Grug’s mother-in-law and the three kids. Eep (Emma Stone), the oldest child, hates the rules, the cave, and her family, and longs to explore new things, in contradiction to her father’s mantra, “New is always bad. Never not be afraid.” 

