Through living fulfilling, independent lives in three different countries, Olivia Segal, Jamie Arias and Annie Aldrich Thomas remain bound to each other by a past mutual tragedy and by their pact. To always be there for each other at times of great need. The first call for help comes from Annie in London - the next fron Jamie in Boston. But finally, when Olivia, in Brussels, uncovers an appalling secret, the pact is put to its most demanding test. In a London vault lies a story waiting to be read, a tale of evil more than fifty years old: a link with the past and the present danger more terrifying than anything the friends could have dreamed up in their wildest nightmares.