Complex sentence: Leila sprints away into the "portal" in her room with Emily following her also; she arrives at Kristi and Katie's mother's house, in 1988, where she finds a young Katie but soon confronts a human version of Toby.
Split into simpler sentences: Leila sprints away into the "portal" in her room with Emily following her also. Emily arrives at Kristi and Katie's mother's house, in 1988, where she finds a young Katie but soon confronts a human version of Toby.