In order to save his mother, a young man embarks in an adventure to get proof of a friendly monster’s existence.

To save his sick Mother, a Young Boy? must get proof of the?existence of a ?being not known to science, so he travels far and wide and brings back a friendly Monster to everyone's surprise.

Not great but you get the idea to simplify it.?? I hope.

Well, then, maybe ?something like:

To pay for an operation that will save his sick mother's life, a poor boy enters a contest to prove the existence of a legendary magical monster. ?(27 words)

Well, then, maybe ?something like:

To pay for an operation that will save his sick mother's life, a poor boy enters a contest to prove the existence of a legendary magical monster. ?(27 words)