Adelaide loves her job, but who wouldn't enjoy traveling to the past to unravel the great enigmas of human history? The rules and regulations of her mysterious workplace may seem rather severe, but their need becomes apparent when a coworker returns from a mission decades older and unable to remember his life in the future. Adelaide embarks on a desperate journey through time to save her friend before he becomes trapped in the past. When her own timeline takes an unexpected turn, the fates of everyone she knows are at stake, and the secrets she uncovers put her own life at risk.