The song of the sea

Evan and Abby are best friends they sometimes hang out a lot. Evan adopted a little boy named fang and Evan cherish fang so much that fang calls him "mother" or "mama" one night Evan went to a rock with fang and sang a sweet song that fang smile at his "mom." A group of guys just left a party that they went to. One of the guys heard an angelic voices that they follow it and saw Evan on the rock singing.