Hermione Granger and her best friends are spending their last summer holiday at Grimmauld Place, and beg for the Order for something useful to do. When they are presented with a list of chores, no one wants to help Professor Snape with brewing. Hermione draws the short straw and ends up being Snape's lab assistant. The collaboration of the two of them sets unexpected events into motion that will eventually change the wizarding world.

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