The phrase "to see the play" means to watch a performance in which actors act out a story on a stage.
Sentences with «to see the play»
... If that was him playing well then I'm glad that i didn't see him play in previous games, last nights performance wasn't absolutely? (justarsenal.com)
I'll never forget the feeling I had of seeing him play for the first time, after many months of nurturing him and kissing all his troubles away. (smallanimalchanel.com)