A Backpack, a Gun and a Codex

In 2100, the humanity meets its demise when facing the Intruders, an invasive, highly developed alien species that drifts through space and dominates habitable planets. In the last-ditch attempt to save the humanity, Mirai Sasaki, a female scientist has sent a package to 2050, 50 years before the final invasion, right before she dies along with her lab being destroyed. Will the person destined to receive the package manage to prevent this tragic apocalypse?