As Grubb and Alistair Grim are beginning to form their father and son
bond, they must do so in secret as the whole of London is convinced that Grim is a mad sorcerer. There’s a bounty on his head and everyone is on the lookout for the telltale sparkling green smoke of the Odditorium.
But the Grims won’t stay in one place for long. Alistair has a plan to
reveal the true evil magician.
Grim is determined to find and defeat Prince Nightshade and find the elusive Excalibur,King Arthur’s sword in Avalon, which contains very powerful
magic. More powerful than any Odditoria he could find. Along with the
rest of the crew: Grubb, Mack, Cleona, Lord Dreary, Mrs. Pinch, and
Nigel, Grimm enlists his old best friend, Oscar Bricklewick, an
extremely intelligent but prickly professor to come along.
In true Alistair Grim fashion, the journey to Avalon is a little out of
the ordinary. As it turns out the house of mechanical wonders cannot
only fly; it can swim too! They batten down the hatches and set off
underwater. But it’s not all smooth sailing. Almost immediately, they
come face to face with a witch called Mad Malmuirie and learn that
Prince Nighshade is after the Excalibur too.
Now it’s a race against time to reach Avalon before Nightshade, but that’s
not all. The true keeper of the Excalibur is written in the Avalonian
Queen’s prophecy, and Grubb begins to realize that his own destiny and
that of his deceased mother might be hidden there as well.
