Bitter vengeance lies in wait beyond the depths...

Miranda Propp was seen as a bright light in the lives of those around her and many thought her future would be just as bright. That was until her light was extinguished the night that she unexpectedly committed suicide at her family's lake lot not long after graduation.

News of the tragedy left her family in shock, and her group of friends divided. After a year of mourning, Miranda's friends River, Ashley and Jebediah, along with her younger brother Edgar, return to the lake to memorialize Miranda. They are all ready to put the past behind them, with each harbouring a secret that they hoped Miranda had taken to her grave.

As they are about to discover, the past cannot be so easily buried.

Since her death, Miranda's spirit has become transformed and twisted by anger and hatred. Now returning to life as a vengeful siren, she yearns to shed the blood of her former friends with her newly acquired malefic gifts. If this group of friends has any hope to survive the night, they must come to terms with the sins of their past. But can they right their past wrongs, or will Miranda plunge them all into a watery grave?