The battle still continues between humans, machines, and… dragons, when John Connor had evacuate everyone to Norway, but when they got there, they had help of what remains of the Norwegian government and they had dragons, now Skynet sent a terminator back in time to terminate hiccup for befriending that night fury will hiccup survivors or will he be terminated

Luego de que las máquinas se hayan rebelado en contra de sus amos, la resistencia humana es lo único que se interpone entre su especie y la extinción. John Connor, el líder de la resistencia americana, se enfrenta como puede a las máquinas asesinas de Skynet, pero la situación lo llevara a descubrir algo más grande de lo que había imaginado.

Skynet is having a hard time terminating the Northern Europe Resistance due to there close connections with dragons, So they sent the T-1000 to the past to terminate Hiccup before he encounters the Dragons, so they won't be a threat in the future. But the Resistance has sent one of there own to the past to protect Hiccup. Will she be able to protect him or will Skynet succeed?