Exposition In the beginning of the book Magnus Chase is supposed to meet with Samirah al-Abbas, but instead he meets up with Otis the goat who tells Magnus that Thor's hammer is missing. Samirah is also being forced into a marriage by her father, Loki
Rising Action A mysterious assassin tried to warn Magnus about the wright's tomb, which of course was a trap. Blitzen was stabbed in the gut with the sword Skofung, the wounds from which are unclosable without the Skofung Stone, which was stone made to sharpen the blade.
Climax In the middle of the story, they go to "Sam's" wedding. Alex is disguised as Sam, and Sam is the bridesmaid. Loki plans to free himself during the wedding. Magnus doesn't figure this out until the wedding, so he fights to stop Loki from being freed. he does not succeed, seeing as how Loki escapes.
Falling action They return to Valhalla. then they are sent to see Helgi the manager who sends Sam on a mission to find and secure her father, Loki. Magnus is sent back to Midgard(Earth)
Conclusion At the end of the story Magnus speaks to his cousin Annabeth, whose boyfriend Percy is the son of Poseidon the Greek sea god.