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The Backup Plan
Intro
No matter how strong the Z fighters become, there's always an evil stronger than them. It's Goku's courage and determination that makes him win. Gohan would not have been able to defeat Cell if it weren't for Goku's encouragement and sacrifice. But what are the Z fighters to do when a new evil attacks and Goku isn't around to help them. He is other world, trapped unable to do anything. Who do they depend on? Gohan? Who is only 13 and is busy taking care of his one year old brother Goten? Vegeta? Who's too engrossed in his training to notice anything?
Krillin? Yamcha? Tien? Are they even strong enough? These parasites are from a planet called Demonica, a planet once governed by Frieza. These parasites are pure evil, they are the eggs of demons, planted by Frieza himself. Of course Frieza was killed by Goku several years back, but no one knew the set of instructions Frieza left them. He may have been a cocky, arrogant, tyrant but he knew that if the legendary super saiyan surfaced, he was doomed.
When he met Krillin, Gohan, and Bulma on planet Namek, he sent a new set of instructions, of course this is before he knew Vegeta was there sabotaging his plans. He had first seen Gohan and Krillin when they were retrieving the fifth dragon ball and a scout had followed them to their camp and saw Bulma. So Frieza sent the message, "if in five years, if I don't reappear with instructions I want you to go to planet Earth and destroy the three humans Krillin, Gohan, and Bulma." Of course when Vegeta came into the picture he tried to add Vegeta to that list but Vegeta had stolen his dragon balls and he got distracted.
It has been five years since that dreadful day and the parasites have arrived. They've been hiding in the shadows, watching, waiting. They know that once they make their move the person they're after will die, but they will die with them. They work like a virus. They take your greatest fear and make you face it by yourself. Your body starts giving out, you start getting beaten from the inside out, until your heart had enough.