Hamilton came through the 90 mins, his first action since going off injured against Bristol City before Christmas.
Match report from Plymouth Argyle.
Plymouth: McCormick, Connolly, Malcolm, Aljofree, Jeannin, Beresford, Bernard, Broad, McGlinchey, Keith, Lowndes.
Cardiff: Margetson, Williams, Jordan, Collins, Jones, Zhiyi, Hamilton, Dimond, Naglieri, Maxwell, Gordon.