I'm not entirely sure specifically as there could be various stories within that title. It might be a real - life confession featured on ITV, perhaps related to a crime, a personal revelation, or an emotional account. Without more context, it's difficult to say precisely.
A true confession story is compelling when it has an emotional depth. If it makes the reader or listener feel empathy, pity, or even anger towards the confessor, it's effective. It's like a window into the human psyche. Also, the context in which the confession takes place matters. Is it a public setting, a private moment, or a written statement? All these elements combined can make a true confession story truly engaging.