After Sarah, witnesses a car crash whilst out jogging and doesn't help the passenger, she becomes increasingly paranoid about not helping. Her guilt begins to affect her daily life once she believes she is being haunted by the passenger she left for dead.

 

Sarah's relationships change for the worse and she can not recover the anguish she feels. her boyfriend breaks up with her and she feels isolated from her friendship group. She loses her job.

 

Finally Sarah agrees to see a therapist, which only makes her feel increasingly worse. Her paranoia makes her believe that the therapist is encouraging her to take her own life.

 

Is this Sarah's paranoia or are the therapist's motives more sinister?