(I apologize if this isn't the best review/description, it's my first time leaving a review and I suck at writing)
Before watching, I was expecting it to be as out-of touch and as lifeless as the other movies after the creator passed away. But, it is so much better. It is a light-hearted and lovey-dovey romance/action movie, and it focuses on Plankton's relationship with his wife Karen. This movie shows how important communication and connection are in a relationship, and I think that's an important lesson for any relationship platonic or romantic. Definitely worth watching.
(side note: I'm glad we have something focusing on plankton and Karen and their backstory; I've always been interested in that.)
(WARNING: MAJOR SPOILERS, do NOT read this part if you don't want spoilers)
Basic (very short) summarization of the movieAs you see in the main show, Plankton is very self-centerd and narcissistic and his wife has to constantly put up with him. She eventually reaches her breaking point and seeks revenge. With help from his friends, he figures out where he messed up and makes it up to her.