In the second installment of J.R.R. Tolkien's epic trilogy, Frodo Baggins (Elijah Wood) and his loyal friend Samwise Gamgee (Sean Astin) continue their perilous journey to destroy the One Ring. They are pursued by the dark lord Sauron's minions, including the treacherous Gollum (Andy Serkis), who was once a hobbit but was corrupted by the Ring's power.