Complex sentence: When a recently deceased playboy, Max, gets to heaven, he is granted one wish (granted to all newcomers): he requests to watch his three best friends, with whom he regularly played poker, for the 24 hours.
Split into simpler sentences: When a recently deceased playboy, Max, gets to heaven, he is granted a wish. His request: to watch his three best friends, with whom he regularly played poker, for the next 24 hours.