A routine kidney scan for incontinence on Willy Wet-Boy goes horribly wrong with a power overload. Now Willy Y-Front’s irradiated kidneys produce PP-999 a deadly compound of Urinis and Day-Glo enabling his underpants to flash in the vicinity of evil–doers.
Willy Y-Front can now project gigantic streams of gelatinous PP-999, use it to swing from building to building, and trap criminals in vast blobs of the rapidly hardening super-substance.