2014, Dublin: at St Edmunds, an elite college on the outskirts of the city, twenty-year-old medical student Theo gets up one morning, leaving behind his sleeping girlfriend, Dani, and his studies - never to be seen again. With too many unanswered questions, Dani simply can't accept Theo's disappearance and reports him missing, even though no one else seems concerned, including Theo's father.

Ten years later, Dani returns to the college as a history professor. With her mother suffering from severe dementia, and her past at St Edmunds still haunting her, she's trying for a new start.

But not all is as it seems behind the cloistered college walls - meanwhile, Dani is hiding secrets of her own.