May Canady is a lonely young woman working as a veterinary assistant who struggles to form meaningful connections due to a troubled childhood and social isolation. Obsessed with perfection and human connection, she becomes increasingly unstable as her relationships with a mechanic named Adam and her coworker Polly fail to meet her expectations. After being rejected and emotionally shattered, May descends into obsession and begins creating something she believes will be the "perfect friend," leading her down a dark and disturbing path.