Sweetpea is a British dark‑comedy thriller series created by Kirstie Swain, based on the novel by C.J. Skuse. Ella Purnell stars as Rhiannon Lewis, an overlooked wallflower whose life spirals into violence after personal tragedy and the return of a childhood bully. As Rhiannon embraces revenge and darkness, she becomes increasingly unhinged Ñ blurring the line between victim and predator. Equal parts psychological thriller, dark humour, and gritty drama, Sweetpea mixes sharp character studies with brutal moral ambiguity. Its stylish tone and unpredictable twists make it a potent, modern series exploring trauma, vengeance, and identity under pressure.