It's the story about an old(er) guy desperately trying to cling on to his old life, but slowly realising he has made some mistakes in the past, so he tries to make amends.
There's the estranged daughter whose love/trust he tries to regain. Which at first doesn't work out & then it does (won't go into any details about how it ends though as that is a spoiler).
There's the woman he falls in love with. Which at first doesn't work out, later on it does.
...
Sure, setting it in a wrestling environment (which felt truly authentic by the way) makes it feel a fresh, but it doesn't make it feel new, to me at least.
Funny thing, after I watched the movie, I scanned through the making of & there was this guy (the producer iirc) who put it really well, something along the lines of: this is undeniably clichéd storytelling, so we had to make sure that the other qualities of the movie (acting, setting, ...) were so great that you forget about the clichés. And they did succeed in that imo.