Death's Captive: Will she escape eternal confinement?

A woman is trapped within a London hospital and can't move beyond its grounds. She doesn't know exactly how long she's been there, and she can't ask anyone because nobody can see her or touch her, except people on the verge of death whose souls she helps move on into the afterlife. She spends her time following doctors and nurses around the wards, eavesdropping on their conversations and observing their lives. Her only reprieve from her isolation is the infrequent visits from Death himself, an entity who appears to be infatuated with her. Follow this ghostly figure as she tries to understand who and what she is while she tries to escape from her monotonous existence.