Additional info:

But Kirk's attempts to knuckle down to his script are thwarted by the news that his younger sister Denise has taken herself off dialysis in Miami and is planning to commit assisted-suicide with the help of the notorious Dr Death and his 'Sisters of Mercy'.

Kirk and Denise have always had a nightmarish relationship, and it will take all of his powers of imagination, not to mention the assistance of KITTSCH (his Knight Rider car-come-conscience), to stop him BLANKing out his failure to be her kidney donor and embark on a heroic quest. Following the example of his TV idols - Hannibal, Face, Murdock, BA, Michael Knight, Luke Duke and Steve Austin - Kirk determines to save Denise from herself, sparking off a chain of events that are as unexpected as they are bizarre.