The Adventure Pass and related rewards are available to collect during The Void Within Plot Event, and access to the Adventure Pass does not expire even after the Plot has finished. Please keep in mind that while access to the Plot also does not expire, you will be unable to collect anymore plot points once the Plot has ended. You will still able to collect any unlocked prizes after the Plot ends.
Please also note that if you are starting The Void Within Plot Event late, you may not be able to earn enough plot points to fully unlock the entire Adventure Pass. To reach the full 45 tiers with the Ultimate Adventure Experience, you will need to collect 80,000 points to fully maximize your purchase. If you did not participate in earlier Chapters of the Plot, please strongly consider whether this purchase will be right for you at this time.