Heaven would be the best reprieve for anyone departing on Earth. However, a step into Heaven's gate showers the person with unfamiliar warmth and undeserving peacefulness which is unreflective of his last few moments.
Jolted to his senses of being placed in such a surreal environment, he laments that it is hell on heaven for he still has amendments to tend to in his past life - thus begging for an extension before this final placement.
Unbounded from the chains, he seeks to right his regrets and to live a righteous life - something so elusive to the living yet dear to those close to death.