Jen and Zeke decide to investigate after they separately witness a ship vanish in the middle of Poseidon's Triangle, a section of water off the coast of Mystic, Maine, that is reputed to be the home to many tragic shipping incidents.

Two young boys, Adam and Gord, and their curious and charming little sister, Molly, make it their mission to solve the mystery of the phantom ship while visiting their aunt and uncle’s farm over Easter break. The children overhear conversations around the mystery and try to solve why it is that everyone is so afraid of the phantom ship. What role does old Ben, the one-eyed crow, play? And how will the mysterious black cat help find clues for the children’s search of the phantom ship? Will the children ever uncover the mystery that remains about the phantom ship, and will they witness the terrifying and unnerving encounter that has left so many locals haunted? Why does the burning phantom ship rise from the depths of Chaleur Bay? Why do onlookers see fireballs flying through the sky from the burning three-masted ship and hear eerie screams echoing across the bay? Why can no one find the remains of the burning pirate ship? These are all questions that the three children in the story try to solve. The phantom ship is very real. Thousands of people who live on both sides of Chaleur Bay (lying between Quebec’s Gaspe Coast and Bathurst, New Brunswick) have witnessed this strange phenomenon and have been haunted by it ever since.

Matt has two weeks left to enjoy summer with his best friends, Danny and Emma, but he has to include his younger cousin Adam. Matt's summer takes on an unexpected adventure when he and Adam spot a burning, ghostly ship and become determined to unravel the mystery. Recruiting Danny and Emma, the four set out to find the ship, only to encounter other, very real dangers on the Northumberland Strait.

Jen and Zeke decide to investigate after they separately witness a ship vanish in the middle of Poseidon's Triangle, a section of water off the coast of Mystic, Maine, that is reputed to be the home to many tragic shipping incidents.

The author has collected "a hundred years' worth of shipboard hauntings, mysteries, and catastrophes passed on from one generation of seafarers to the next," demonstrating that the real mysteries of the sea are even stranger than fiction.

In the misty dawn of January 31, 1921, a Coast Guardsman on watch at the Cape Hatteras Life-Saving Station sighted a mighty five-masted schooner, all sails set, wrecked on the treacherous Diamond Shoals. Rescuers rushed to the ship, but when they arrived