Things haven't been going well lately with the Dashton's Marriage. Dashi has been rather..distanced lately. And to Shellington's shock, it's due to her newfound lover! Dead set, Shellington stubbornly tries to win back the fickle heart of Dashi for the sake of their marriage! But while on this journey, he faces countless of the Octonauts' tragic pasts. Will Shellington be able to save everything from falling apart?