Kate bonds with an amnesiac woman after she wakes up and crawls from her grave following a murder attempt, claiming to remember that a bomb is present on a Navy ship. Gibbs and DiNozzo identify the woman as an explosives fabricator who works for a civilian contractor, charged with manufacturing and testing bomb detection devices for the Navy. When one of the woman's coworkers turns up dead, the team investigates the second murder. Meanwhile Kate attempts to help her recover from amnesia, only for the case to come to a deadly close.