What did the world look like as it was transforming into the horrifying apocalypse depicted in "The Walking Dead"? This spin-off set in Los Angeles, following new characters as they face the beginning of the end of the world, will answer that question.

After witnessing her parents’ murder as a child in Bogota, Cataleya Restrepo grows up to be a stone-cold assassin. She works for her uncle as a hitman by day, but her personal time is spent engaging in vigilante murders that she hopes will lead her to her ultimate target: the mobster responsible for her parents' death.

A manager hires Ray, off the books, to paint all the power towers in a 15-mile stretch of high-tension wires outside Sheffield. Ray's crew of men are friends, especially Ray with Steve, a young Romeo. Into the mix comes Gerry, an Australian with a spirit of adventure and mountain climbing skills. She wants a job, and against the others' advice, who don't want a woman on the job, Ray hires her. Then she and Ray fall in love. He asks her to marry him, gives her a ring. Steve's jealous; Ray's ex-wife complains that he spends on Gerry, not his own kids, and she predicts that Gerry won't stay around. Plus, there's pressure to finish the job fast. Economics, romance, and wanderlust spark the end.