What does Brian's daughter promise to do while taking care of him until he dies?
iSOLATE is the story of Scout Taylor, a young woman who returns to the family's remote cattle station after the sudden death of her mother. As an only child and with Brian her father suffering from a progressive and debilitating illness, she commits to leaving behind her coffee shop in the city and staying on at the farm to look after him and the property. On the day of her mother's funeral, when all the mourners have left and she and her father are alone, Brian confesses he and her mother had made a pact. He tells Scout that her mother had promised to assist him in taking his own life before his illness would render his body useless, and eventually, painfully steal his last breath. But now, with her mother's tragic death making that impossible, he turns to Scout to help him with his desire to commit suicide.  Enraged by his admission, on this day of all days, Scout reveals that her mother had already tearfully confided the details of his plan some months earlier, a plan that she wasn't as complicit with as he would have liked to believe. Rather than assist his suicide, Scout vows to help her father continue running the property while nursing him to a peaceful and natural death. 
One morning after feeding the horses, Scout returns home to cook her father breakfast only to discover he has disappeared. At first she is not overly concerned, but as the day wears on she begins to fear that in his now fragile state he may have had an accident, or worse. Alone and cut off from all communication, she sets about doing whatever she can to find him.  As night falls, the darkness intensifies her fears, and after exhausting all possible solutions in finding him, she retreats back to the isolation of the house. It is back at the house, alone with her thoughts and conscience, that the reality and horror of this film unfolds, revealing a dramatic and twisting climax.
continue running the property