An Octoling girl who's been betrayed more that once, and lost everything to someone she thought she loved, begins to grow cold. Unintentionally teaming up with an organization called 'The L.O.S.T', she's paired up with a gentle-hearted Octoling boy, who had a soft spot for her since the day they first met — when she had spared his life. Can he mend her battered heart?

In a world where mammals have returned, and cephalopods have been castaway, two soulmates meet once again after growing apart. Little does one of them know, the other is one of the castaways — constantly on the run. Will the pair work things out or grow apart all over again?