The six-part show is loosely based on the story of Irish women vanishing, with a particular focus on investigative journalist Lisa Wallace, who published an article about her mum's murder.

Lisa, who is played by India Mullen, received a chilling letter from her mother's killer after reading the piece. Meanwhile, Allen plays the role of a detective, who is tasked with solving the first girl's mysterious disappearance.

The film's official synopsis reads: "After publishing an article about her mother's murder, Journalist Lisa Wallace gets a chilling letter from the killer, taunting her with pictures of the murder and of a new victim.

"Soon, news comes of Amy Reynolds, a woman who's gone missing. Lisa and Detective David Burkely (Leech) begin fighting through Garda [Irish police] red tape as more girls go missing.

"Meanwhile, the killer plays psychological torture games with Lisa, making her choose his victims and even threatening her in person. Lisa and David’s path leads them into the crosshairs of the deeply corrupted core of the Garda.

"To cover their tracks, high-ranking Garda members blackmail David with his own secrets. This threatens to destroy them both as they get closer to facing off with the killer who murdered Lisa's mother all those years ago."

"The Vanishings" also stars Laoise Sweeney as Susan Reynolds, Aaron Monaghan as Gareth Brennan, Derbhle Crotty as Barbara Adams, Gráinne Good as Amy Reynolds, Brian Moore as Mark Bulger and Philip O'Sullivan as DCS Gill.

The six-part series is set to hit Channel 5 on Thursday 6 February at 9pm.

* This article was originally published on Evoke.ie.