In May 1997, Paul Bearer attempted to rejoin The Undertaker, using the ultimatum of revealing The Undertaker's "deepest, darkest secret" to the world. Bearer accused The Undertaker of having burned down the family funeral home business when he was a child, killing his parents and ostensibly his younger half-brother as well. The Undertaker denied all this; however, Bearer claimed to have proof in the form of The Undertaker's alive and well half-brother Kane, who had survived though scarred and burned. Bearer raised Kane after the fire, having him institutionalized from the date of the fire into adulthood. Ever since the fire, Kane had been awaiting to exact vengeance on his older half-brother. In defense, Undertaker responded that Kane, a pyromaniac, had been the one to set the fire and could not have possibly even survived. Also during the period, Bearer had unintentionally admitted to Undertaker's mother having an affair with him. As a result, it was revealed to The Undertaker that Kane was his half-brother. Until that point, Undertaker spent his life (the entirety of the father's life) under the impression that Kane was fully related to him and his family. It was during this time that The Undertaker also made an appearance in Michinoku Pro Wrestling, defeating Hakushi in a singles match.