Thor was the mighty Thunder God who had a hammer that when swung it lighting appeared in the sky.One day he woke up to find it missing. He assumed his brother Loki took it and Loki assured he did not and that he would prove his innocents.
Loki traveled to the world of the Frost Giants. Loki came across Thrym who when asked if he had the hammer said he did and would only give it back to him if Freya married him.
Freya declined and them Loki came up with the idea of him and Thor dressing as Freya and her maidservant.
As Thor dressed in a brides dress they put Freya's necklace and keys on him. As they soared to the land of the giants Thrym yelled to get everything ready and to bring the hammer so he could bless his bride.
Thor waited until they brought the hammer and set it in front of him before he attacked Thrym and killed him.
After killing Thrym and many other giants Thor and Loki got onto the goat chariot and carried the hammer back to the land of the gods.