Ruin Secrets|Five Nights at Freddy's Security Breach: Ruin AU|13+

This AU takes place after the scooper ending. Gregory, Vanessa and Freddy take Cassie back to their house to help her recover, and then she goes home with her mom. They think she destroyed the mimic with the scooper, but they realize that after Cassie had shut down all the security nodes, she set it free, which means there could be a chance that the mimic is still at the pizzaplex and roaming around. They must go back to the pizzaplex and hide it again, or find some way to destroy it.