Part 6/9:
An unpredictable argument leads Paula to confess her motivations—she too harbors regrets about altering her past and wants to help Zoya in her quest. Their bond, built on mutual understanding and a desire to reclaim lost time, accelerates their scientific efforts. However, they face setbacks, quarreling about their approach and limited resources. Zoya realizes she needs support from her past, leading to heart-wrenching encounters with her former professor and ex-lover Mark.