Complex sentence: Life becomes hell for James as well as Padmini as Jhonny is not allowing James to leave the house, but destroying all happiness, Jhonny comes to know Padmini's past life.
Split into simpler sentences: Life becomes hell for James as well as Padmini as Jhonny is not allowing James to leave the house. But one day, destroying all happiness, Jhonny comes to know Padmini's past life.