The aftermath of a violent attack on District Three has left ITF Director Bill Taggart feeling uneasy. All is too calm. The Indigenes have returned to normal life; even his wife is moving on. Bill wishes he could do the same. When a surprise illness starts spreading through the Indigenes' home, Bill's greatest fear comes true. It's a medical problem he's not equipped to deal with. Setting aside his fears, he asks an old rival for a favour. But when conditions in District Three deteriorate fast, he has no choice but to give in to his sworn enemy's demands. A virus is loose, and his rival may be the only one capable of identifying its source. If Bill and his team can't figure out the origin of the virus soon, it could end up destroying two civilisations.