The Medallion of Kings (Open Novella Contest)

Sarah Roberts, 28 years old, archaeologist, about to have the biggest break in her career. The discovery of an ancient Egyptian tomb, utouched, wields many prized artefacts, amongst which an emerald medallion. Sarah's dream has come true. Everything was perfect.
Except for the small, insignificant fact that the owner of the tomb showes up for his treasure.
And then things got complicated...