The last woman on Earth finds herself in a race to answer the phone to finally hear another human voice. Something is making calls, and she needs to find out what. In a world where gravity doesn't work as expected and night is eternal, she finds just answering the phone to be a deadly challenge.
What if there really are people out there trying to reach her? What if it is an intelligent machine trying to make contact? And why does reality bend to the ring of a phone? Only answering will give her the answers she needs.