NORTH
 J4
 Q4
 J75
 QJ8432
 32
 T987
 A964
 K65
  KQ865
 J65
 QT
 A97
  AT97
 AK32
 K832
 T
Dealer: East    Vul: EW   MP Scoring

West

1N1
2
Pass
Pass

 North

Pass
Pass
2N4
Pass

East
1
2
Pass
Pass
Pass

South
Pass
X2
X3
35

 Passed Hand Action 

1 Forcing 1 round, 5 to 11 points
2 Takeout for the other two suits
3 Optional Penalty and club shortness
4 Weak takeout
5 At least as many diamonds as hearts

North South had their signals crossed on this one.
South's couldn't double at first turn for lack of clubs.
South's double of 2 was penalty oriented, including at least 4 spades, yet not strong or balanced enough to overcall 1N.
Against a potential East 2 contract, South's heart lead and North ruff should result in at least 6 tricks.

Against South's 3 contract, West started the 3 won by declarer's A.
The Q, K and A were cashed, dummy discarding a spade on the last heart.
A spade was ruffed in dummy.
East won dummy's low club exit with the A and led another.
South ruffed and led another spade to be ruffed in dummy while West discarded the K.
Dummy's Q was led and the 2 discarded while West ruffed.
West cashed the A and exited the T and East contributed the Q.
Declarer discarded, but West's 9 was still due.

North-South's total included 1 spade, 2 spade ruffs, 1 club ruff, 3 hearts and the K. Down one.