Cookies need to do it all over again in league semi-final
Young Munster will take on Lansdowne in the Ulster Bank League Division 1A play-off semi-final after a sensational final round.
The Cookies required other results to go their way as well as beating leaders Lansdowne at Tom Clifford Park and they duly obliged.
Tries from Paul Allen and Diarmaid McCarthy were enough to seal the win for the Limerick side with Gearoid Lyons also kicking a penalty and conversion.
John Staunton's men will now travel to the Aviva Stadium back pitch for another meeting with Lansdowne on Saturday, April 25 (2.30pm) to decide who takes on either Terenure or reigning champions Clontarf in the final.
Elsewhere, Cork Con finished a disappointing eighth after defeat at home to UCD and already-relegated Dolphin finished bottom after an away loss to St Mary's.
In 1B, there was drama up until the final whistle at Crowley Park as Garryowen lost their grip on the title, losing away to Galwegians.
They must now contest a promotion/relegation play-off on the road against St Mary's to see if they can return to Division 1A.
Shannon finished sixth despite losing away to Malone and UL Bohemians finished the season in eighth - they beat Corinthians.
In 2A, Cashel (fifth) finished as the highest-placed Munster team, while in 2B, Highfield are champions and were promoted, but Richmond were relegated from the Ulster Bank League after a disappointing campaign.