It is May in Aberystwyth, and the mayoral election campaign - culminating in the traditional boxing match between candidates - is underway. Sospan the ice-cream seller waits in his hut for souls brave enough to try his latest mind-expanding new flavour, and Louie Knight, Aberystwyth's only Private Detective, receives a visit from a mysterious stranger called Raspiwtin asking him to track down a dead man. Twenty-five years ago Iestyn Probert was hanged for his part in the notorious raid on the Coliseum cinema, but shortly afterwards he was seen, apparently alive and well, boarding a bus to Aberaeron. Did he miraculously evade the hangman's noose? Or could there really be substance to the rumours that he was resuscitated by aliens? Now, as strange lights are spotted in the sky above Aberystwyth and a farmer claims to have had a close encounter with a lustful extraterrestrial, Iestyn Probert has been sighted once again. But what does Raspiwtin want with him? And why does Louie's investigation arouse unwelcome interest from a shadowy government body and a dark-suited man in a black 1947 Buick?