We invite you to a fascinating world of romance and mystery aboard a luxurious submarine in the early 20th century. Set on a journey from Hamburg to Helsinki, Secrets Under the Waves will present secrets, love, and tension unfolding in a limited time and space.

You are a detective who has been commissioned by three sisters, Clara, Maria and Emily Aderaine, to solve the theft of a large Fabergé egg, their prized inheritance. With only 10 hours to arrive in Helsinki, you must explore various spaces inside the submarine, find clues, track down suspects, and uncover the truth of the case. You will also have the opportunity to build trust and share your feelings through conversations with the three sisters. The hidden stories of attractive suspects, including a gorgeous actress, a dedicated flight attendant, and a dignified countess, are revealed one by one.

Key features:
Thrilling mystery: Gather clues, interrogate suspects, and uncover the mystery of a stolen Fabergé egg.
Choose Romance: Communicate with three sisters with different charms, develop relationships, and find true love.
Fascinating setting: Explore a luxurious submarine under the sea and enjoy the old-fashioned and mysterious atmosphere.
Multiple endings: Depending on your choices, the outcome of your journey will vary, including whether the case will be solved or not.
Beautiful illustrations: Detailed backgrounds and characters add to the immersion of the game.
Will he be able to retrieve the stolen treasure and find love with one of the three sisters? Or will this mystery be forever buried beneath the waves?

Park Geon-woo's detective series "Mystery Airship" offers multiple playthroughs.