Nancy Drew lands an internship at the Beech Hill Museum in Washington D.C, which is devoted to Mayan culture and will soon be exhibiting a newly discovered monolith to the public. However, shortly before the exhibition opens, one of the museum's most treasured pieces is stolen from the museum, and the thief leaves behind a mysterious red handprint. Nancy must find the stolen jade carving of Pacal and save Beech Hill from financial ruin.