Complex sentence: Davos convinces Salladhor to drop him off there, intending to stop Melisandre influencing Stannis by assassinating her; he is given an audience with Stannis where he is shocked to discover his king and friend is indifferent to his survival and refuses to send Melisandre away.
Split into simpler sentences: Davos convinces Salladhor to drop him off there, intending to stop Melisandre influencing Stannis by assassinating her. Davos is given an audience with Stannis, and is shocked to discover that his king and friend is indifferent to his survival and refuses to send Melisandre away.