When the spoiled tin was opened

Starts in the summer between CoS and PoA. The incident with Marge Dursley was more serious than in canon and Harry is caught by the Aurors. But is his situation as bad as it looks? Meanwhile, some of the most important people lose any illusions about the British wizarding world being fair and just. There is also an ICW meeting coming, so the ugliest truths must be quickly hidden.