The episode ends at the Lifaus Highway near Flugel’s Tree. As Subaru’s phone alarm goes off, the massive White Whale appears from the sky, and Rem initiates the battle with a preemptive strike. Notable Production Details
They chose the track "Yoake no Michi" (Path of Dawn), which they felt best suited Subaru's character and the atmosphere of the scene. Character Shifts Re:Zero kara Hajimeru Isekai Seikatsu Episode 19
It is revealed that Wilhelm van Astrea has a deep personal vendetta against the White Whale, as it killed his wife, Theresia (the former Sword Saint). The episode ends at the Lifaus Highway near Flugel’s Tree