Join the LEGO® City deep-sea explorers at the Deep Sea Operation Base! Help the experts analyze samples taken from the seabed, while above the surface the powerful seaplane arrives with a flatbed submarine and extra oxygen supplies. Lower the sub into the water and dive down to help the research submarine investigate the mysterious chest locked in an underwater cove. Use the sub’s robotic arms to cut through the iron chain and open the cove gate. Then use the deep-sea diver’s crowbar to open the chest and discover the hidden treasure. But watch out, there’s a snappy shark on the way! It’s just another day for the deep-sea explorers! Includes 5 minifigures with assorted accessories: a pilot, deep-sea diver, scuba diver and 2 deep-sea explorers.