A new mother discovers a lullaby in an ancient book and soon regards the song as a blessing. But her world transforms into a nightmare when the lullaby brings forth the ancient demon Lilith.

Reeling from her father's suicide, Jemma decides to take the illicit drug known as Necro, said to reconnect the living with the recently deceased.

Tales of a cursed, evil mermaid lurking in a small town lake are the stuff of urban legend until four friends find out the hard way that she's real.