What does it all mean? 3NT was forcing, asking partner to cuebid a side-suit king or ace. 5♠ said no side-suit ace or king, but great trumps. You decide that is not enough and pass. (Listen, I had to get you to 5♠.)
West leads the ♥J. Spades are 2–2. Plan the play.
Opening lead: ♣2 from a conservative but reasonable player. Say you win dummy’s queen, smartly unblocking the 10, and lead the ♥A. East shows out (what did you expect?), discarding an encouraging diamond. When you play the ♦A and another diamond, East plays the king and West the queen on the second diamond. When you play the ♠A and another spade, West plays the ♠9 and ♠10. Plan the play and be specific.