In the vastness of the ocean, you are not alone. Your fellow submarine has disappeared from the radar and you need to find out what happened and ready the torpedo for any possible threats.
As soon as you enter the game you instantly become a crew member! Through many challenging puzzles you also need to launch the Torpedo, complete the mission and find your way out. Your job is to work out how, when and where... Don't forget you have only 60 minutes to complete all tasks.