In 2015, months since the events of Rise of the Tomb Raider, Lara Croft (Camilla Luddington) and her friend Jonah Maiava (Earl Baylon) have dedicated themselves to stopping the activities of paramilitary organization Trinity. The two track a cell to Cozumel in Mexico, led by Pedro Dominguez (Carlos Leal), the head of Trinity's High Council. At Trinity's excavation site, Lara discovers a temple containing the Dagger of Chak Chel and references to a hidden city. Murals adorning the walls allude to the Silver Box of Ix Chel and warn of "the Cleansing", a Mayan apocalypse culminating in a permanent solar eclipse. Lara ignores the warnings and takes the Dagger to prevent Trinity from acquiring it. Dominguez catches her and reveals that by taking the Dagger, Lara has triggered the Cleansing. He takes the Dagger, intending to unite it with the Box to stop the Cleansing and use the power it grants him to remake the world in his image. Lara and Jonah escape a freak tsunami that destroys Cozumel and foreshadows the coming apocalypse.