A girl and a Chihuahua in the apocalypse

Emma, a 10-year-old girl, has to survive in a hostile and ruined world because of an apocalypse caused by Amatlein, a cosmic creature that destroyed human civilization. She will not make her trips alone because she has next to her Chihuahua Buddy, a small dog that can talk and who will accompany her on her long journey from Alaska to Patagonia. Where she hopes to find her mother since she is the last member of her family that is alive on planet earth because her father is in the space station completely alone and with no possibility of returning.