Kate works at the hospital in the Return Unit, helping those who have been infected by the virus that turns people into zombies. Kate’s dedication to her work is absolute, but few people realize that for her it is also a personal matter; Kate’s own husband, Alex, has been returned. After various brutal and prolific attacks at the hands of Anti-Return groups and rumours that the “Protein” stock is running dangerously low, Kate fears for Alex´s safety.
Suspicious of the government’s order that all the returned should report to a secure medical facility ‘for their own safety’, the couple decides to flee, taking with them all the doses of “Return Protein” they have. At no point does the couple imagine that the real threat is a lot closer than they think...