On the mysterious island of Osea, a man named Sam finds himself drawn into a strange and unsettling series of events that blur the lines between reality and nightmare. As he delves deeper into the island's secrets, he uncovers a web of ancient rituals, dark family histories, and hidden agendas that threaten to consume him. With each passing day, Sam must navigate the enigmatic inhabitants of Osea while confronting his own inner demons. Meanwhile, a woman named Helen arrives on the island searching for answers about her past, only to find herself entangled in a twisted tale of deception and madness. As Sam and Helen's paths converge, they must confront the sinister forces at play on the island and unravel the mysteries that bind them together. "The Third Day" is a gripping psychological thriller that explores themes of identity, memory, and the thin line between sanity and madness. With its haunting atmosphere, compelling characters, and unexpected twists, this show will keep viewers on the edge of their seats until the very end.