Edit in JSFiddle

@import url(http://fonts.googleapis.com/css?family=Lato:300,400,700);
body {
	font-family: 'Lato', Calibri, Arial, sans-serif;
	color: #89867e;
	background: #f9f9f9;
}

*, *:after, *:before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }

a {
    text-decoration: none;
    outline: none;
}

a img {
    border: none;
}

.caption {
    -webkit-backface-visibility: hidden; /* prevent flash when embedding fiddle */
	display: inline-block;
	position: relative;
	margin: 10px;
	overflow: hidden;
	background: rgba(0,0,0,0.2);
	-webkit-transition: background 0.3s ease-in-out;
	-moz-transition: background 0.3s ease-in-out;
	transition: background 0.3s ease-in-out;
}

.caption:hover {
	background: rgba(0,0,0,0);
}

.caption img {
	display: block;
	max-width: 100%;
	-webkit-transition: -webkit-transform 0.3s ease-in-out;
	-moz-transition: -moz-transform 0.3s ease-in-out;
	transition: transform 0.3s ease-in-out;
}

.caption:hover img {
	-webkit-transform: translateX(100%);
	-moz-transform: translateX(100%);
	transform: translateX(100%);
}

.caption::before,
.caption::after {
	position: absolute;
	width: 100%;
	z-index: -1;
	background: #cecece;
	-webkit-transform: translateX(-30%);
	-moz-transform: translateX(-30%);
	transform: translateX(-30%);
	-webkit-transition: -webkit-transform 0.3s ease-in-out;
	-moz-transition: -moz-transform 0.3s ease-in-out;
	transition: transform 0.3s ease-in-out;
}

.caption::before {
	content: attr(data-title);
	height: 30%;
	color: #05b19a;
	font-size: 40px;
	font-weight: 300;
	padding: 30px;
}

.caption::after {
	content: '\201C' attr(data-description) '\201D';
	top: 30%;
	height: 70%;
	color: #fff;
	font-size: 14px;
	padding: 20px 30px;
}

.caption:hover::before,
.caption:hover::after  {
	-webkit-transform: translateX(0%);
	-moz-transform: translateX(0%);
	transform: translateX(0%);
}

<a class="caption" href="http://cargocollective.com/jaimemartinez/Illustration" data-title="Viking" data-description="Suddenly a gust of wind came up from the north. There appeared a lone rider, holding a sword of steel. Then from the south came another, bearing a battle ax."><img src="http://tympanus.net/Tutorials/PseudoElementsImageCaptions/images/4.jpg" alt="Illustration of Viking"/></a>