The Trials of X are more massive than ever! As Storm battles the Lethal Legion on Mars, there are explosive problems on the Peak - and the mole inside S.W.O.R.D. stands revealed! Wolverine hunts the leviathan that lurks off the shores of Krakoa, but can even he take down a hidden creature of the deep that's bigger and stronger and older than math can figure? The Marauders have their hands full too - with Fin Fang Foom! And the Hellions might all hate one another, but Nanny loves her latest addition! Orphan-Maker, though, has other feelings - and dangerous ideas!