waters of the pacific, kona, hawaii, it's mother's day. diving enthusiast lisa costello, a single mom, is on vacation and decides to go out on a boat to see some dolphins with professor lee tefley, a man who shares her enthusiasm for diving. >> it was a really calm day, really clear. and we saw some activity maybe ten miles out. >> as we got closer, it turned out it was a group of pilot whales. incredible. >> whales are not normally social animals. so costello and tepley can't believe how close those whales are swimming to their boat. the professor and the diving enthusiast decide to seize the opportunity and get in the water for a closer look. >> they're very playful right now. they're all around us. i got in the water first, and i was just floating there, and one male came right up to me and stopped. so i looked at him in the eyes and he looked at me, and i went above the water, and he went