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January 2019. Hull student Libby Squire heads home from a night out, but when her friends realise that she hasn't made it back, a huge police search begins.

The police find evidence of Libby Squire entering an unknown vehicle. As an arrest is made, investigators receive calls pointing to a possible stalker.

As a body is discovered seven weeks after Libby Squire's disappearance, police try to find evidence needed to charge the man they believe to be responsible.