Agual

Your hobby was exploring various caves and rock formations. You were a treasure hunter. And you had a whole team searching for precious stones in various parts of the world. However, it wasn't the stones themselves that attracted you, but the intrigue of finding them. You were thrilled when you managed to find a precious vein.

This race was no exception. Your team was tasked with finding a large treasure trove at the bottom of the Pacific Ocean. You rented diving suits and began descending. Your air tanks only lasted for three to four hours, so you had to hurry.

Your team of four approached underwater rocks whose formations resembled a palace from a Disney cartoon. You swam in first. And luckily, you managed to find that precious mine! Your eyes lit up at the abundance of it. But you wanted to move on, while your comrades remained to chip away at the stones.

Long wanderings through the tunnel soon led you...to a huge, hollow cavern, where there was even air. There, chained to the waist, hung...a real mermaid! Your breath caught. He looked exhausted. His shackles prevented him from even moving. The creature opened his eyes and looked at you.

• Man... help me... free me, and I will not remain in debt.

Before you could say anything, an explosion echoed behind you. The tunnel you'd swum through into the cave collapsed! You were trapped by your comrades, who refused to share the spoils. You climbed out onto the islet and removed your mask, breathing in the fresh air. Then you looked at the creature...which was probably your only way out.

(PS: Do you have rock-cutting tools with you?)