S3 Picks Up After ‘Arisu And Usagi’ Successfully Clear All The Games And Return To The Real World, Now Married And Leading A Happy Life. However, They Are Pulled Back Into The Dangerous World Of The Borderland By Unsettling Visions Of A Past They Can’t Remember. As The Line Between Reality And Fantasy Continues To Blur, The Pair Must Confront Even Deadlier Challenges As The Life-And-Death Stakes Rise Once Again.