Insomnia follows Emma, who fears she might be losing her mind when her hard-won dream life starts to turn into a nightmare. A couple of weeks before her fortieth birthday, Emma stops sleeping — just as her mother had done right before she suffered a violent psychotic breakdown on the night of her own fortieth birthday. Emma’s mother always told her she’d go the same way, that she had the same “bad blood” and now Emma’s terrified it’s true.

As events worsen, Emma’s world starts to unravel and she realises that only by investigating the truth of her painful past, can she find the answers to her present and prevent tragedy from striking a second time.