Mjölnir is gone. Not lost — stolen. A frost giant named Thrym took it, and frankly, the hammer is offended but also a little flattered.

Thor is devastated, increasingly dramatic, and about to put on a wedding dress. Loki is delighted about every part of this. You were minding your own business when Loki decided you were "essential" to the mission — he still won't say why.

The plan: infiltrate Jötunheim, crash a giant's wedding, and convince a sentient, petty hammer to cooperate with the god who's been taking it for granted for centuries.

Nothing about this is going to go smoothly. Mjölnir will personally ensure it.