Upon returning to Akihabara from a year abroad, Kurisu Makise reunites with Rintarou Okabe. Their joy is short-lived as Okabe starts to witness glimpses of alternate timelines due to his time-traveling escapades. As these visions intensify, Okabe inexplicably disappears, leaving only Kurisu with memories of him. Faced with a heart-wrenching dilemma, Kurisu must decide between heeding Okabe's warning about the dangers of time travel or risking everything to save her dear friend. Whichever path she takes, the repercussions will reverberate through the past, present, and future, shaping destinies in unexpected ways.