Shu Shu, leading a blameless life, finds herself falsely accused of murder and incarcerated in Agwell Women's Penitentiary. To navigate the perilous environment, she forms an unlikely alliance with the notorious convict Minicat, proposing marriage for protection. However, Shu Shu grapples with unexpected romantic feelings towards Minicat, conflicting with her heterosexual identity. Their relationship is complicated by Minicat's insistence on secrecy, adding layers of intrigue to their connection.