Yet I am a man and I have a heart to do and dare

“Yet I am a man and I have a heart to do and dare. I have no title save that of an uncrowned sovereign; but I have an arm and a sword that yet might free Schutzenfestenstein from the plots of traitors.”
(a) Who is ‘I’ here?
(b) What can he do for his beloved?
© Which word in the extract means the same as ‘conspiracies’?

(a) T here refers to ‘Trevelyan’ who is the hero of‘Best Seller.’
(b) Trevelyan tells his beloved, Princess Alwyna, that he has a sword that can save Schutzenfestenstein (an imaginary character) from traitors. He wants to impress her by saying that he is brave and can save her from any dangers.
© The word is‘plots’.