The series follows twin brothers Zack and Cody Martin and hotel heiress London Tipton in a new setting, the SS Tipton, where they attend classes at “Seven Seas High” and meet Bailey Pickett while Mr. Moseby manages the ship. The ship travels around the world to nations such as Italy, Greece, India, Sweden and the United Kingdom where the characters experience different cultures, adventures, and situations.

During spring break, Cody and Zack are approached to join the Gemini Project, a high-tech research center studying the dynamics between twins. Shockingly, they find themselves interconnected in a way they’ve never been before! When one twin experiences a sensation, thought or feeling, the other twin feels it too. While this newfound revelation helps the boys see eye to eye for the first time, it puts them in more danger than they could have imagined.