Set in Australia, the movie tracks the Nohara family embarking on a budget-friendly honeymoon excursion stumbled upon by Misae. What was meant to be a romantic getaway turns into a perilous escapade as Hiroshi, the focal point, becomes entwined in a treasure hunt. Shortly after their arrival in Australia, Hiroshi vanishes, leaving the rest of the family to navigate a treacherous path filled with enigmatic masked figures and avid treasure seekers in a race to rescue him.