Here's a summary of the ending:
1. Preparing the Escape: Andy meticulously executes his escape plan, which he has been secretly working on for years. Using a tiny rock hammer and patience, he creates a tunnel from his prison cell to the sewer pipes, concealed beneath a poster of Rita Hayworth.
2. Prison Riot and Warden's Death: A riot breaks out in Shawshank, led by inmates demanding better treatment. During the chaos, Andy seizes the opportunity to escape through the tunnel. Warden Norton, the oppressive and corrupt prison warden, is found dead in his office, an apparent suicide.
3. Discovery of the Tunnel: The next morning, the guards discover Andy's escape. They find his tunnel, but he is nowhere to be seen. The tunnel leads them to the sewer, where they discover the poster concealing the entrance.
4. Andy's Letter to Red: Andy leaves behind a letter for his fellow inmate and friend, Red (Morgan Freeman). The letter reveals that Andy has managed to escape to the city of Zihuatanejo, Mexico, and he expresses his hope that one day Red will join him there.
5. Red's Parole: Years later, Red is finally released from prison on parole. He honors Andy's wish and travels to Zihuatanejo. At the beach, he finds a letter from Andy describing the beautiful life he has built there.
6. Reunion in Mexico: Red discovers Andy sitting under the large oak tree they had once discussed and reminisces about their time in Shawshank. They embrace each other, finally free and together again.
The movie ends with Andy and Red living happily in Zihuatanejo, having found peace and redemption after escaping the harsh reality of Shawshank State Penitentiary.