Welcome To Paper Mario: The Thousand Year Door. The story goes on about Mario and Princess Peach getting involved in a search for a mystic treasure that holds great fortune. However, Peach has unfortunately been kidnapped by an alien group called the X-Nauts. Now, Mario needs your help. You both then receive a map from Goombella and Professor Frankly that can potentially reveal the location of the seven legendary Crystal Stars to unlock a Thousand-Year Door. Will you join Mario in his quest?