The plot is very simple, there is a married woman (Katey) who is having an affair. After her death the story follows her lover, the man who she was having the affair with. He is alone, he's lost the love of his life and doesn't know what he can do. A strange woman on the London Underground gives him a card telling him to call "Life Line", he phones the number and it is some kind of support group/chat line. He talks to a woman on there who seems to be exactly like his ex-lover Katey. After breaking one of the chat line rules he's banned from the service. He searches for the place where the chat line runs from, when he gets there its all locked up, no way in. There is a woman there who is also wanting to be in, desperate to get back onto "Life Line", they talk about what happened to their loved ones, from there all the pieces of the puzzle begin to unravel.
It is ultimately a story about life and death, and that after life its not necessarily all darkness. There is an afterlife if you're willing to believe, death is not the end but only a transition.
This story contains love affairs, true love, a plot of revenge, mystery and generally is something which is worth a watch. It seemed in some ways quite experimental for the BBC, a show touching on death but also the frequent sex scenes and some nudity are very much an area which the BBC stay away from.
It's not your typical two part drama from the BBC but something new completely, a show which touches on an interesting subject, something that could in fact be true. Perhaps there is a phone line somewhere that can connect you to another world, maybe people just haven't found it yet.
I recommend everyone out there to see this show, its definitely not to be missed. Without a doubt one of the best one off BBC dramas in a long time!