Lucy, eleven-year-old Robbie's sister, is about to celebrate her 15th Birthday. Single minded, as she usually appears, she wants a big party. Dad has said "NO" to hiring the local church hall, but agreed to using the house on the conditions of limiting the number of guests and worse, stipulated that Robbie is allowed to attend and invite a guest. From the start of the party day, in spite of the two appearing to co-operate, there are more than a few trifling problems. As party time looms, Mum and Dad, along with Auntie Sheila and Uncle Roger have barricaded themselves upstairs in the front bedroom with phone communication to Robbie. The usual suspects are in attendance, along with their weirdo neighbours' even odder son and daughter, and so the evening parties on, Mum could possibly be on the verge of a panic attack. Someone, somehow, needs to take control...