At the Shiba House, with Antonio having conquered his fear of fish Emily and Mike decide to keep the stray kitten as a pet. The Rangers are surprised to see Antonio and Mentor Ji working collaboratively to store the Shark Disk (which is capable of defeating General Gut) with the Light Zord. Mike plays a prank on a distracted Antonio by putting dry cat food in his plate of trail mix but is caught by Mentor Ji who gives Mike a taste of his own medicine before deciding to continue working on the Disk outdoors, free of distractions. Meanwhile at the Sanzu River, Octoroo announces the return of the powerful Nighlok Eyescar to Master Xandred, who has a plan to trap the rangers. Upon completing the Shark Disk, Antonio and Mentor Ji are kidnapped by a swarm of Moogers. With the Gap Sensor sounding the rangers head to investigate their disappearance. While following the trail left by Antonio’s dropped reel the Rangers are ambushed by a large amount of Moogers. Mike figures out there is something within the Light Zord and unleashes it, which turns out to be the Shark Disk. This allows Jayden to access Shark Attack Mode to destroy all the Moogers effortlessly. Eyescar eagerly awaits the arrival of the Rangers with his massive Mooger army, outnumbering the Rangers a hundred to one but Jayden having anticipating the situation, enters the fray with the Samurai Battlewing destroying most of the Moogers with an aerial assault. The Rangers then move in and rescue Ji and Antonio before defeating Eyescar together. When Eyescar returns to life as a mega monster the Rangers use the Shark Sword to finish him off. Back at the Shiba House, Antonio and Mentor Ji thank the rest of the team for their help and Mike attempts to try the same prank again on Antonio only to be caught by Mentor Ji again.
In a subplot Bulk and Spike try to create signature symbols for each other.