Commuters see their Departed on Boston's Red Line trains.

Consultant Harry West is hired to investigate by the Massachusetts Bay Transportation Authority. His project turns personal when his ex-wife Alexandra Ben-Tov meets their beloved daughter on the Red Line, who looks like the teenager she might have become if she had lived.

Are the visitors on the Red Line ghosts or hallucinations? Either way, when Harry's team discovers the source of the visitations, the MBTA declares it will bring them to an end.

Alexandra has a brilliant idea: Build Visitation Rooms that replicate the features of Red Line train cars so that people can continue to meet their loved ones.

But not everyone approves. The Archbishop of Boston seeks to get Visitation Rooms banned in Massachusetts. And a gangster who frets that his victims might return from the dead warns Harry and Alexandra: Cancel Opening Day for the first Visitation Room, or else!