December 31, 1965: Five close friends, realising that circumstances will see them go their separate ways in the world, make a secret pact to meet again.
Twenty-five years later, Matt Brown is agonising about attending that reunion, for as desperate as he is to see his friends again, he also realises that fulfilling his long-held promise could put himself and those he loves in danger. However, Matt is not the only person with concerns about the consequences of attending.
Unbeknown to the original five, there are other people planning to be at that reunion, as a rogue government department struggles to hold onto its own long-held secret, one that will affect everyone who attends the reunion for the rest of their lives