Macbeth, commander of the Scottish army, meets a trio of witches on his way home from work and everything goes downhill from there — taking king and country in a slow descent of ambition, murder and madness. As chilling today as it was 100 years ago, Shakespeare’s haunting and haunted “Scottish play” blooms into fully-realized glory in Giuseppe Verdi’s sumptuously scored adaptation. Punctuated with towering arias from the scheming, unraveling Lady Macbeth and demanding an unbelievable emotional range from Macbeth’s baritone, Verdi’s masterwork is a spine-tingling event that leaves an unforgettable, indelible mark.