Jodie Packer is a single mum, who owns her own hairdressing business.
One day, she witnesses something seemingly innocuous, but soon finds herself as the significant witness in a murder enquiry and facing a campaign of intimidation.
It begins with a series of strange text messages, memes and links to her phone. As her paranoia grows, a local gang mounts a terrifying threat against Jodie and her young son Kyle.
Witness Number 3 airs w/c 18th July on Channel 5.