On the first day of their spring break, best friends Tucker and Maya discover a "Special Collection" of Titanic artifacts at the local museum. But the artifacts have more power than they know. When they touch a magic ticket, Tucker and Maya find themselves transported 100 years in the past Ñ to Titanic's maiden voyage. Now they must figure out how to save a new friend, and return to the present, before time runs out.

Tucker and Maya are at it again going back aboard the Titanic trying to help a boy by the name of Liam. This time the time travel piece is a teacup from the first class lounge. They travel back while the Titanic is sailing the maiden voyage Tucker and Maya are trying to save Liam from going down with the Titanic as his family and he are third class passengers. Tucker and Maya fear they may not make it off the Titanic and safely aboard one of the life boats to reach America. They race to talk with the captain of the ship to warn him of the icebergs when the captain informs them they have all ready gone farther to the south to avoid icebergs. Tucker and Maya assume they are in the clear when the ship comes to a screeching halt and when the teacup breaks.

After Tucker and Maya are jolted back to the present by Titanic's iceberg collision, they don't know what will happen to their new friend, Liam, who is still trapped onboard. They travel back to 1912 again to make sure Liam and his parents, all third-class passengers, make it to the lifeboats in time. But none of the passengers seem to realize the severity of the situation. Tucker and Maya must convince everyone that the unsinkable ship is sinking, and find Liam, before it's too late.

With Titanic already sinking, Tucker and Maya are frantic to get back to 1912. The two friends travel back to 1912 one last time and join the survivors in the lifeboats as they wait and hope for a rescue. In a twist of fate, their final interaction with Liam teaches them a piece of their own history as well.