Merneptah's successor, Seti II, was a son of Isisnofret II. However, his accession to the throne was not unchallenged. A rival king, named Amenmesse, seized control of Upper Egypt and Kush during the middle of Seti II's reign. This rival king was most likely another son of Merneptah. Seti II was able to reassert his authority, but not before Amenmesse vandalized his tomb (KV15).
(KV15) was dug along a northwest to southwest axis, comprising of a short entry corridor followed by three corridor segments which terminated into a well room. The well was never cut into the floor. This then connected with a four-pillared hall and another stretch of corridor that was converted into a burial chamber. The walls and ceilings of the chamber were covered with plaster and painted with Anubis jackals and two rows of deities, representing the followers of Ra and Osiris. Wall paintings in the well room were more unusual and showed the king in shrines in a number of different manifestations, for instance on the back of a panther or on a papyrus skiff. After regaining control, Seti II returned the favor and destroyed Amenmesse's tomb (KV10).