Philippe Cousteau visits an estuary in North Carolina and catches blue crabs, which have adapted to both saltwater and freshwater. Then Philippe goes to Curacao and takes a submersible 500 feet below the surface to look at sea life.
Plans backfire when the kids go to surprise their parents with breakfast in bed on their anniversary, only to catch Phil and Claire in a compromising position. Jay and Gloria's Vegas plans are thwarted, and Mitch and Cam obsess over a local restaurant.
To avoid becoming a boring couple, Phil and Claire revisit a roleplaying rendezvous from the previous Valentine's Day. Meanwhile, Jay plans an elaborate surprise for Gloria, and an admirer comes between Cameron and Mitchell on Valentine's Day.
Han insists the diner gang attends a mandatory night out in an 'Escape Room Club' when he feels they aren't working together as a team. However, once they're locked inside the 'Alice in Wonderland'-themed room, they find Han has an ulterior motive.