Kate and Alex make an enviable couple: They are young, successful and very much in love. Kate works at the hospital in the Return Unit, helping those who have been infected by the virus. 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 rumors 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. Kate has a contact on the inside and is sure she can get hold of more doses until the situation calms down, but now they are in a race against the clock. What if Alex runs out of time? And what will happen if Alex, now a fugitive, is discovered? At no point does the couple imagine that the real threat is a lot closer than they think…