Described as an 'appetiser' for All Flesh Must Be Eaten, this is a complete adventure which ought to take one or two sessions to run. As it has a mediaeval timeframe, characters should be generated using the 'Dead at 1000' setting in the core rulebook. It's suitable for a one-off game, or it may be part of a longer campaign in that setting.
The plot is basically a retelling of the traditional tale The Pied Piper of Hamlin, with zombies instead of the rats in the original. The backstory links back to the 'Dead at 1000' setting with the Piper himself having been an acolyte of the fellow responsible for the rise of the walking dead in that setting, now travelling the length of Europe causing his own zombie plagues and then being rewarded handsomely for getting rid of them! A neat little moneyspinner... until he reaches Hamlin. For first of all the town is broke (due to somewhat shady practices on the part of the mayor) and secondly... well, the party is in town.
The idea is that the party arrives a few days before trouble erupts, so they have an opportunity to explore. Why they are there is left up to them (and you), but prominent figures and locations in town are described to facilitate them getting to know the place. There is building consternation as news of advancing walking dead is heard, and the mayor leads the town in making preparations to defend itself. Then the dead come...
When all seems lost, the Piper turns up and offers to lead the walking dead away, for a fee. The deal done, he indeed does so. There's a big celebration, then the next morning at an awards ceremony the mayor is hosting, the Piper arrives in search of his fee - which the mayor cannot pay! The Piper takes his revenge and it is up to the party to set things straight.
It's a neat retooling of a traditional tale, well presented and with plenty of action. Plans of Hamlin and the Piper's hideout are provided, along with plenty of detail about his endgame. This leads to the possibility of further adventure, should you so wish. Appetiser indeed, certainly makes me hungry for more!