Loki was captured by the Chitauri who had a score to settle with him. Tortured and seemingly dead he fell on Tony Stark s tower. Tony and Loki discover a secret S.H.I.E.L.D. is hiding and it might cost them both everything they are. They need Thor and they need the other Avengers by their side. And warm clothes because they have to go to Jotunheim, too.