Please provide the official download link and give us some information about the mod pack.
Official page: https://www.technicpack.net/modpack/blightfall.592618
It is a modpack which is basically an adventure map mixed with magic and science. You start on a random space station above a planet completely covered in Alien biomass called Blight and you are sent down (alone or with friends) to clear the planet so that people can live on it.