It's July 28, 2018 at the San Antonio Aquarium. With school out for the summer, the aquarium is bustling with families. It's a seemingly normal day, until an employee spies something fishy: two men exiting a restricted area, pushing a baby stroller that's leaking water! Suddenly, alarms are blaring – the water is contaminated with bleach! Employees rush to solve the problem and everything seems fine… except one beloved aquatic resident named Miss Helen… is gone!