Picking Up After Quint And Dirk's Hero Quest, The Last Kids Are Happily Reunited--but Quickly Faced With A Monstrous New Mission. Inside An Other-dimensional Fortress, The Evil Thrull, Alongside A Vile New Villain, Is Carrying Out A Sinister Plan. Jack, Quint, June And Dirk Must Make Their Own Plans To Infiltrate The Stronghold Before Thrull Gets Any Closer To Completing The Mysterious Tower, A Structure That Could Ultimately Spell Doom For This Dimension.