During the group's investigation of paranormal activity in an ancient tomb located in China, Diana got turned into stone.
Going deeper into the tomb, the group was separated and while Martin trying to locate the others, he heard the scream of DIana. Eventually, in a room he found the statue of Diana, covered by a cloth with a shock expression on her face.
She later reverted back after the group putting a pot of glittering white powder onto her, although she still have difficulty moving which was the remaining effect from her statue form. Eventually, she later fully reverted.