From the publisher:
Jump onboard the good ship Tranquility and set sail for paradise. Take care, though, because in a land where the day blends into night it's easy to lose track of time and you still need to find that special little island to call home.
Tranquility is a cooperative card game in which players must fill the sea with islands — specifically island cards with numbers on them — and guide the ship home before any player runs out of cards. Note that in the world of Tranquility, the only way to play is in silence.