All we know is that Krypton faced destruction, and that is the reason why Kal-El arrived on Earth. Not much of a backstory aside from his parents trying to save their firstborn.
Frankie is a 21st-century computer programmer, turned ufologist when she is approached by the members of the LSS Slicer crew. The starship being commanded by Captain Caldwell. She becomes their most significant asset in the temporal war.
The Slicer was built to map the multi-dimensional wormholes and black holes in the universe. The crew would and go where no one else would dare, as there was no guarantee of ever returning home.
The storyline is excellent, great actors do the acting, and I do highly recommend this movie to any fan of either science fiction or horror, even paranormal.
“Universal law is for lackeys. Context is for Kings,” is a quote from Star Trek Discovery. It was said by one of my favorite Star Trek characters of all time despite its short live glory in the show, Captain Gabriel Lorca. It is an understatement to say it inspired my entire sci-fi series.