Gwen investigates the death of an alien enthusiast called Eugene Jones in a hit-and-run accident, and is intrigued by photographs of random shoes that are on his mobile phone.
Taking an incorporeal form, Eugene follows Gwen to find out how he died, as his memories slowly return.
After receiving an eye that fell to Earth as a consolation prize, Eugene began collecting alien artefacts.
After discovering Shaun worked at the local convenience store, Eugene decided to try to sell the eye on eBay in order to raise enough money to buy tickets to Australia for his co-worker, Linda.
They had raised the price initially to get Eugene's hopes up, but, when the first large bid came in from a collector, they realised that, if they could get the eye, they could resell it for more.