In 1000 AD, Crono and Marle watch Lucca and her father demonstrate her new teleporter at the Millennial Fair in the Kingdom of Guardia. When Marle volunteers to be teleported, her pendant interferes with the device and creates a time portal into which she is drawn. After Crono and Lucca separately recreate the portal and find themselves in 600 AD, they find Marle only to see her vanish before their eyes. Lucca realizes that this time period's kingdom has mistaken Marle (who is actually Princess Nadia of Guardia) for Queen Leene, an ancestor of hers who had been kidnapped, thus putting off the recovery effort for her ancestor and creating a grandfather paradox. Crono and Lucca, with the help of Frog, restore history to normal by rescuing Leene. After the three part ways with Frog and return to the present, Crono is arrested on charges of kidnapping Marle and sentenced to death by the current chancellor of Guardia. Lucca and Marle help Crono to flee, haphazardly using another time portal to escape their pursuers. This portal lands them in 2300 AD, where they learn that an advanced civilization has been wiped out by a giant creature known as Lavos that appeared in 1999 AD. The three vow to find a way to prevent the future destruction of their world. After meeting and repairing Robo, Crono and his friends find Gaspar, an old sage at the End of Time, who helps them acquire magical powers and travel through time by way of several pillars of light (the party is able to challenge Lavos at any point after this scene, with completion of the game prior to its final chapter unlocking one of twelve different endings).