Thylacoleo carnifex, the marsupial lion, gets its due in this account of an Australian fossil hunt that turns up a nearly complete skeleton hidden in a cave system. The film follows the excavation team as they work the site, freeing bones from rock and packing them out for lab study, treating each fragment as a clue to how the animal lived. Thylacoleo was Australia's largest land predator, and researchers here debate what its teeth and claws say about its hunting style, some evidence pointing to an ambush predator built like nothing alive today, other evidence suggesting it scavenged and ate plants as readily as meat. The cave recovery itself is the film's set piece: tight passages, careful bagging of specimens, and the slow process of turning a jumble of bones into a mounted skeleton. Comparisons to big cats come up often, mostly to explain what made this marsupial's killing equipment so unusual for a pouched mammal. The result is a plain record of fieldwork rather than a dramatized hunt.