Complex sentence: Rourke plays an aging professional wrestler who continues to wrestle matches in an attempt to cling on to his 1980s heyday despite his failing health, while also trying to mend his relationship with his estranged daughter and find romance with a stripper.
Split into simpler sentences: Rourke plays an aging professional wrestler who, despite his failing health, continues to wrestle in an attempt to cling to the success of his 1980s heyday. He also tries to mend his relationship with his estranged daughter and to find romance with a stripper.