最偉大的小偵探回來了！Bonnie和祖父受邀登上海上慶典船，沒想到夜霧降臨，一聲驚叫後船長離奇死亡，身上滿是疑似海怪留下的傷痕。Bonnie立刻變身為偵探Montgomery Bonbon，展開搞笑又聰明的追查行動！The world's greatest detective is back in the fourth instalment in a brilliantly clever, funny and highly illustrated murder mystery series.Shenanigans are once again afoot in the town of Widdlington, and this time they're on board the Dreadnowt – a galleon ship that’s set to host a fireworks display for the town. Bonnie Montgomery and Grampa Banks are on board as guests, but just after sundown, a fog rolls in and a terrible cry is heard over the crash of the waves. Captain Valancourt stumbles out of the mist, dripping wet and covered in red welts, the like of which a sea monster would leave behind, and is soon pronounced dead by the doctor on board.The crowd is shocked, and Bonnie's fishy-o-meter is off the charts. While Inspector Sands takes over as captain, Bonnie transforms into Montgomery Bonbon, and it’s not long before she’s laid anchor on her prime suspects.Can Montgomery
