The Simpsons family gathers for the couch gag and opening credits.

Police set up a fake boat giveaway to arrest scofflaws.

Homer gets arrested for unpaid parking tickets at the boat scam.

Lisa protests the new mall being built on a fossil site.

Lisa uses lawyer Lionel Hutz to force the mall developers to allow an archaeological survey.

Principal Skinner announces the dig trip for honor and detention students.

Students start digging but find nothing interesting at first.

Lisa uncovers a skeleton with wing-like bones, sparking angel speculation.

Townspeople argue whether the skeleton is an angel while Homer and Mr. Burns intervene.

Homer steals the angel skeleton and locks it in his safe-deposit closet.

Townspeople visit the Simpson house to see the angel for prayers and good luck.

Homer sets up a paid viewing of the angel skeleton.

Lisa takes a bone sample to a scientist for DNA testing.

Professor Gould returns with inconclusive test results, disappointing Lisa.

Lisa and Marge argue about faith and science regarding the angel.

Lisa debates the angel on TV, leading to a mob attacking science institutions.

Lisa decides to destroy the angel skeleton to end the controversy.

Lisa is arrested for destroying the angel, leading to a trial.

The angel skeleton appears on a hill with a doomsday warning.

The Vatican and townspeople react to the doomsday prophecy.

The townspeople gather and count down to sundown, expecting the end.

The angel is revealed as a publicity stunt for a new mall opening.

Lisa and Marge make up after the hoax is revealed.

The episode ends with credits and final scenes.