Cordelia (Antonia Campbell-Hughes) lives with her twin sister Caroline (Campbell- Hughes) in their late father’s basement flat in central London. Once a promising actress, an event years ago in Cordelia’s life changed her outlook and emotional state. She became reclusive, introverted and left acting. 

Her gradual move towards independence is placed into jeopardy when her sister leaves for a weekend away with her boyfriend Matt (Joel Fry). Strange occurrences happen and overwhelms Cordelia, who begins to unravel, regressing back to the state of confusion she has tried to repress ever since surviving that terrible event many years ago…