Jennifer Wolf leaves San Francisco to join her father on the archaeological dig he is leading in Mexico. When she arrives on site, she can't find any trace of him and all his belongings have been ransacked. Prior to his disappearance, he managed to hide a certain manuscript - a book, dating from the 16th century, telling of the last sacred Mayan calendar which had been broken up into five separate fragments and entrusted to selected guardians to ensure its protection. With the help of Raphael, your father's assistant, it is now down to you to solve the mystery. You will examine archaeological sites, cross the Mexican jungle, take an in-depth look at Monument Valley, pursue your investigation as far as Washington, seek out advice from a friend in Navajo, and uncover yet more secrets in a wide range of locations steeped in mystery. According to ancient Mayan beliefs, all the fragments of the calendar must be reassembled before 21st December 2012.