A frantic rooftop race.
Alchemy lessons on a zeppelin.
A booby-trapped pyramid . . .
Just the start of semester two at Prometheus High.

Athena and Marceline are on a mission to unearth Marceline's past - if their foolhardy plans don't get them expelled or killed.

Godfrey's lonely without his friends, so when Emily needs a favour he's eager to help. But is her request all that it seems?

Meanwhile, on the airship Atet, an ancient monster of unsurpassed power and fury is about to awaken . . .