Cretaceous: Biohazard

Royce Teller is a multi-billionaire who focuses on pharmaceutical gains, skirting US commerce laws by working in South America under the guise of a large archeological dig site. To keep things on the up and up, he dedicates the upper floors of the underground facility to fossil study. Royce hired his son, a grad student, and a group of his friends to work in the archeological facility, unbeknownst to them what goes on in the lower levels. Recently Royce has been unable to reach anyone working in the facility. It was normal to not be able to reach individuals on the lower levels, but no one has heard from the facility in weeks. Reaching out to a few associates, Royce puts together a group of a few "specialists" to head to the facility and figure out what's going on, without involving the local government.