The series, which is provisionally titled Stalked, will see Stacey spend time with victims and perpetrators as she explores the devastating impact of stalking.
As part of the doc, Stacey works with a specialist police unit in Cheshire, where she spends time with a victim support organisation.
"Prior to these films, I perhaps hadn’t taken into account just how truly devastating and life-changing stalking can be," said Stacey.
"Victims are often forced to change their lives entirely and often likened their normality to simply ‘existing’... These survivors deserve to be heard and prioritised."
In the documentary, Stacey meets 25-year-old Sabrina, whose ex is going to court accused of stalking. She also meets Katie, whose ex partner was sent to jail for inundating her with abusive messages and faking an attack from her.
The BBC explain: "In the first episode, Stacey will explore ex-partner stalking - the most common type of stalking behaviour. Twenty five year-old Sabrina’s ex is going to court and she will find out if he is convicted of stalking her; the police investigate a pilot accused of stalking his ex-partner who works in cabin crew, but is he heartbroken or is it more sinister?
"Katie’s ex-partner was imprisoned for bombarding her with abusive messages and faking an attack by her, but he is being considered for early release; and Andy has just come out of prison after being convicted of stalking. Stacey discovers that even when victims think stalking is over, it often isn’t."
In the second part of the doc, Stacey delves into 'stranger stalking' investigating how to stop stalking and whether a custodial sentence, or therapy, works best.
She meets a dancer who was stalked by an obsessed fan and a fraud investigator who is accused of using his skills to stalk a work colleague.
"Stacey finds out there are no one size fits all answers when it comes to preventing stalking and prison alone can’t do it, but with police and health professionals working together tackling each case long term, we’re more likely to see real changes", the BBC explain.
BBC is yet to announce a release date, but we'll let you know as soon as we hear...