Follow the Sheikah Slate

"" is a BotW: in.

Overview
BotW: obtains the Quest shortly after a BotW: awakens him and urges him to leave the BotW: to restore the light to BotW:. Once he has started exploring the BotW:, the voice will call out to him again. The voice instructs Link to head towards the destination marked on the BotW: Map.

Upon reaching the buried remains of the BotW:, Link is instructed to place the Sheikah Slate into the BotW:. Once he does so, the Tower will be activated, and he will be warned to watch for falling rocks. In doing so, Link causes the Great Plateau Tower to shoot upwards out of the ground that once held it. This causes a simultaneous reaction among all of the other NaN Sheikah Towers scattered across Hyrule, forcing them to rise as well. At this same exact moment that the Sheikah Towers collectively ascend, NaN Ancient Shrines across Hyrule begin to glow an orange light, acting as a sort of beacon to allow Link to locate them from a distance. When Link regains his composure following his rapid ascension, the Great Plateau Tower begins to distill regional information on the Great Plateau in the form of a tear drop, which splashes onto the Sheikah Slate and updates its Map with landmarks and geographical data.

The voice calls out to Link again before Link begins to leave the Tower, urging him to remember the events leading up to his awakening. However, BotW: interrupts her and begins to swirl around BotW: before being driven back by a white light emanating from the Castle. The voice warns Link that when Calamity Ganon regains its full strength, she will no longer be able to contain it. This completes the Quest, allowing Link to descend the Great Plateau Tower and speak to the BotW:, who tasks him with the next Main Quest, "BotW:".