Castles in the Sand

S9 E22: Alex one morning is doing her morning workout run on the beach where she finds a big beautiful sand castle on the beach in front of her tower; she gets curious and tries to find out who has been making these lovely sandcastles. A couple of days later she runs down to her tower to find a young boy building a sand castle outside her tower. He sees Alex and runs away; she chases him and discovers something personal about his appearance.