(Sequel to "Days After the Apocalypse (Jelsa/Big 5 VS Zombies)" ) When the US is starting to be safer, after the antidote to the z-virus was found, Elsa and her sister decide to travel back to Norway. They start their ocean travel with Kristoff, Rapunzel, Flynn, Merida and Hiccup. All of them are going back to their homes and the former group is going to get separated. Jack stays with the Guardians since he made a vow to serve and protect with them. The promise of seeing his friends from the big 8 again one day is on his mind daily. However the virus is mutating and becoming a pandemic. The nice and smooth sail is becoming a deadly trap at sea. Is there a way to survive when the situation seems hopeless?

Jack Frost, Elsa Vinter, Rapunzel Corona and Merida of DunBroch are admitting in a National Sport competition in USA. Each of them has their own specialities. Meanwhile Hiccup Haddock is surveying the safety of the event. Then everything starts to turn out ugly. USA is being infested with the undead who roam the land as they soon find out. Will they team up and form the Big 5? What does it take to survive from this breathtakingly serious situation?