Plot SynopsisWith bells tolling, the film opens with a zoom-in to a marble wall memorial "in tribute to the police officers of San Francisco who gave their lives in the line of duty" (presented by a citizen""s committee) [located at the Hall of Justice, 850 Bryant Street, between 7th and 8th Streets].While investigating the torpedo firing on board theEnterprise, Spock theorized and soon learned that (1) the shots came from an invisible, cloaked, prototype Klingon vessel beneath theEnterprise(later revealed to be Chang""s Bird of Prey), (2) the two assassins (and their "incriminating" gravity boots) were actually onboard theEnterprise, and (3) the two killers were paid Federation assassins Yeomen Burke and Samno (drops of Klingon purple blood from the shootings were found on their uniforms on the ship) - both were later found shot dead at close range after the deed.ThePearlcrashed into the rocky volcanic shore of the island, as Salazar""s crew returned to theSilent Marywith Henry as hostage tied to the mast.When McGonagall arrived with Snape and Quirrell, Hermione humbly took the blame and praised the two boys for saving her life - cementing their friendship further.Meanwhile, heavyweight champ Mason "The Line" Dixon, frustrated by his faltering reputation and damaged superstardom, returned to the small gymnasium where he had trained, and spoke to his old trainer Martin (Henry G.