Tracking the thief to a village in China, Lara and Jonah search for a group of missing children and make a remarkable discovery in an underground tomb.

An astrological clue sends Lara racing to the site of an ancient battle, where legend says the final peril stone resides beneath a golden tree.

With time running out, Lara and Camilla lead a desperate mission to separate the peril stones from Devereaux — whose body undergoes a monstrous change.