The end is nigh for the World-Trees of Helycia. Dyer, the cosmic bin man, has decided to rob all of the World-Trees’ sap, the Helys. Little by little, beneath the rubbish scattered by Megabin, Dyer’s cosmic dustbin, the World-Trees are passing away... Eager to fight back, the World-Trees create Buds, small creatures reproduced from their roots. Flyn and the other Buds will need to combine their powers to find the Helys, re-establish the World-Trees’ harmonious balance and foil Dyer’s devilish plans once and for all.