"The Lord of the Rings" is based on the novel "The Lord of the Rings" by Chinese United Kingdom writers John · Ronald · Riel · Tolkien, and this novel is widely recognized as the ancestor of modern fantasy culture.
The series tells the story of the dark lord Sauron, who forged a supreme ring of supreme power thousands of years ago, and then the ring fell into the hands of the innocent boy Frodo, who resisted the temptation of the ring and finally traveled to the Doomsday Mountains with the help of his friends to destroy the ring.
The Lord of the Rings: The Fellowship of the Ring (2001)
The movie mainly tells the story of Frodo (played by Elijah · Wood) in the old Middle Ages, accompanied by loyal companions Sam (Sean · Austin), Melly (Dominic · Monaghan) and Pippin (Billy · Boyd) and other righteous warriors, embark on the journey of destroying the Lord of the Rings.
The Lord of the Rings 2: The Two Towers (2002)
It is an epic fantasy film about a world full of magic and fantastical creatures, where the protagonist Frodo · Baggins embarks on a grand adventure with a group of heroic companions under the temptation of the mysterious Lord of the Rings. Set in the Second Age of Middle-earth, the evil Dark Lord Sauron has created a magical ring that enables the wielder to become the ruler of the entire world.

The Lord of the Rings III: The Return of the King (2003)
This is the final chapter of the Lord of the Rings series, telling the story of the hobbit Frodo carrying the Lord of the Rings and his partner Sam and others to Mount Doom, along the way with many difficulties and dangers, and the Lord Sauron tried his best to prevent the destruction of the Lord of the Rings.

I used ProcessOn to create the following diagram of the characters or events of The Lord of the Rings for you to understand the plot development more clearly.

A diagram of Lord of the Rings characters or events
The series won 351 international awards and 284 nominations, including 17 Academy Awards. Among them, "The Lord of the Rings: The Return of the King" won 11 Academy Awards, tied with "Ben-Hur" and "Titanic" to become the most awarded film in Oscar history.
The Hobbit: An Unexpected Journey (2012)
It tells the story of Bilbo · Baggins, instigated by Gandalf, to join the dwarves and go to the Lonely Mountain to help the dwarves reclaim the treasure seized by the evil dragon Smaug, but on the way, he accidentally fell into the cave where Gollum was hiding, and then found the One Ring, and secretly took it back to Hobbiton for himself.

The Hobbit: The Battle of Smaug (2013)
It tells the adventure story of Bilbo · Baggins, a hobbit, who continues to go to the Lonely Mountain with everyone to find the evil dragon Smaug and start his first battle with it.
The Hobbit: The Battle of the Five Armies (2014)