The series focuses on the adventures of a half-human, half-oyster mutant named "Boyster", who was born from a toxic spill and adopted by a pair of humans and raised with his shell brother Shelby. Naturally, Boyster has to keep his oyster side under wraps, but he will use his many oyster-esque abilities to save the day.

On a tropical island, the carefree and playful Fatou spends her time with Roger, a clumsy alien. Together, they're never short of ideas when it comes to doing something silly, the perfect pretext for a host of adventures.