We begin this story with an array of Asgardian characters on the moon. This happens to be where Mjölnir went after Thor was deemed unworthy. All of the Asgardians, including Odin, try to pry the hammer from the surface. None are able to.
While the attempts to lift the hammer are happening, there is an invasion of Frost Giants on Earth. Odin says that it is not an Agarsian issue and leaves. Odinson decides to try and save Earth even though he does not have the hammer. This does not end well for him. He loses his left arm in the battle and the Frost Giants continue to attack earth.
While this battle wages on, we see someone new lifting Mjölnir from the moon's surface and heading to earth. This is different than what most expect as Thor is now a woman. She possess Mjölnir and all the power that comes it.
Once back on earth, she confronts the Frost Giants, who are being led my Malekith the Accursed. Malekith is the leader of the Dark Elves and always has an alterior motive. The Frost Giants are looking for the head of their ancient King Laufey. He fell in battle many years earlier on Earth and his remains were never found. Until Roxxon Corporation, an evil corporation, discovered them at the bottom of the ocean.
The attacks is taking place at Roxxon Corporation Headquarters. The CEO of Roxxon, Dario Agger, is not all that he seems to be either. It turns out he transforms into a Minotaur. He, eventually, locks himself inside the vault where the skull is stored. Eventually Malekith makes his way inside the vault and the two of them fight.
While Malekith and Dario fight. The Odison shows up to confront Thor. He says she stole the hammer and they end up doing battle. They fight until Odinson realized Mjölnir has chosen this new Thor. He decided to trust the hammer and fight alongside her.
After they have defeated all the Frost Giants, Thor enters the vault and smashes the skull. She says of that's what they're fighting over, neither will have it. Malekith leaves and burns Odinson's severed arm. Dario tells them to leave his property. We later see Dario and Malekith discussing a deal for the real skull. The one that was destroyed was a fake.
Back on the moon, Thor is about to place the Hammer down when Freyja, shows to warn her. Freyja is the wife of Odin and the mother of Odinson. She warns Thor that Odin will come for the hammer and that she should be prepared.
This ends the tale of the Frost Giants' attack on earth but does not end our story. There is one last part to cover. Back in Asgard, Odin has called upon his brother, Cul Borson to act as his minister of justice. Cul is the God of Fear and has previously tried to take over Asgard. Odin is so desperate he has decided to trust him. Odin wants to know the identity of Thor and wants the hammer returned to, who he believes, is its rightful owner. Our story ends with Cul and Odin looking at the destroyer. This is a metallic robot like Asgardian weapon that is very powerful. Cul plans to use it to find Thor, reveal her indentity and return the hammer.
While Odin is appointing a new minister of justice, Odinson is in one of the halls trying to narrow down his list of who Thor could be. He approaches Lady Sif, who he had a relationship with. He asks her if she is the new Thor, she gets offended by this notion and throws mead in his face. She storms off while he continues to drink mead. Eventually, he is led out of the hall by his warriors three.
This story is a great read. It has a lot of action and a lot of great storytelling. The establishing of Thor being a woman and not being a version of Thor is new and interesting. They establish her story really well. She is a strong courageous person. She won't back down from a fight and she's resourceful.
This story incorporates a lot of well know villains, heroes and side characters from the history of Thor. It is also a good introduction as it provides a lot of details so there is not a lot of information missing on past events. Especially when it comes to what actually made Odinson unworthy. No one knows what was actually whispered.
I have read the next volume of this story as well. It only gets better. Please check out Thor Vol. 2 if you want to know how this story plays out!
Also, please check out the Book of the Month for February 2016: The Chew Vol. 1 from Image Comics