Dave embarks on what should be a peaceful solo holiday at a Scottish lakeside hotel, but his solitary retreat takes an extraordinary turn when a swimming expedition leads him through a concealed waterfall. On the other side of this natural barrier, he discovers himself transported to an otherworldly realm that defies the ordinary landscape he left behind. Stranded in this enigmatic fantasy dimension, Dave must navigate its strange rules and inhabitants while grappling with the mystery of how—and whether—he can return home. What began as a chance to spend his first independent holiday away from his family becomes an unexpected journey into the unknown.