Hennessy is an Irishman who believes in peace, but who has had connections to the I.R.A. After his family is killed he plots revenge, setting out to assassinate Queen Elizabeth II.Hennessy is an Irishman who believes in peace, but who has had connections to the I.R.A. After his family is killed he plots revenge, setting out to assassinate Queen Elizabeth II.Hennessy is an Irishman who believes in peace, but who has had connections to the I.R.A. After his family is killed he plots revenge, setting out to assassinate Queen Elizabeth II.