A bold proposition for the Staircase Project puts the group at odds. Will weighs his options. Ye returns to a familiar place.

Obsessed with their virtual reality quest, Jin and Jack race to solve a complex riddle — but advancing to the next level brings harrowing consequences.

Auggie’s countdown jeopardizes her nanotech work. Jin becomes engrossed in an otherworldly VR game. Ye Wenjie follows through on a radical idea.