24.Kh2

White escapes the Knight check with the only move that doesn't lose by a forced sequence. Black, however, doesn't need a forced sequence to carry on with the attack.

The Knight is no longer attacked by the Pawn, which is now pinned by the Rook. It is, however, attacked by the King. White could now play 24...Qh6 to protect the Knight, but there is a better move.

Next move: 24...Nf4