A Backpack, a Gun and a Codex

In 2100, the humanity faces the threat from Intruders, an invasive alien species that have dominated the space. In the last-ditch attempt to save the humanity, Mirai, a female scientist has sent a package to 2050, 50 years before the final invasion, right before her lab gets destroyed and she is killed. Will the person destined to receive the package manage to prevent this tragic apocalypse?