After a virus wipes out 99.9% of humanity, carefree slacker Kyle turns an empty Los Angeles into his personal playground. He thinks being almost the last man alive means no rules, no responsibilities, and endless fun.
Then Ella shows up.
She is efficient, practical, and obsessed with survival—the exact opposite of Kyle. The two argue constantly over how to live in this new world, but somehow end up sticking together.
When Ella decodes a mysterious radio signal, she becomes determined to reach a military base 200 miles away in the hope of finding other survivors. Kyle thinks it is a terrible idea, but when she leaves, he eventually goes after her.
They finally reach the base. The gates suddenly open—and a third survivor steps out holding a gun.
From that moment on, their world is no longer just the two of them.