Cordelia ia a struggling, broken heart that is only just recuperating after some unnamed injury; she is a star practicing a play as well as pertains to stay in a weird London estate level inhabited by her twin sibling Caroline as well as Caroline's guy Matt. When they leave her alone there Cordelia strikes up a relationship with Frank the lovely, yet unusual and also unstable young man they can hear practising his cello in the upstairs level-- a connection which swiftly becomes very disturbing.