Complex sentence: Together Foyle and Jisabella escape from the prison and get his tattoos removed--but not with total success: the markings come back when Foyle becomes emotional or excited.
Split into simpler sentences: Together Foyle and Jisabella escape from the prison and get the tattoo removed--but the removal is not total. Although Foyle's face looks normal most of the time, the markings come back when he becomes emotional or excited.