Two men who share an apartment, with vastly different outlooks on life, are pushed further and further away from each other, as one of them slowly approaches an existential crisis, and the other seems to slowly give up hope for change.

8-year-old Selma Traskvist and her family are in danger of being evicted from their home, when Selma meets scientist Efraim von Trippelhatt who is working to build an airship and prove Santa's existence.